diff --git a/.clippy.toml b/.clippy.toml
deleted file mode 100644
index 56ce04e..0000000
--- a/.clippy.toml
+++ /dev/null
@@ -1 +0,0 @@
-msrv = "1.56.1"
diff --git a/.dockerignore b/.dockerignore
index a86661c..7b0da2b 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -4,6 +4,7 @@
 /target/
 /.cargo/
 /assets/
+/config/
 
 # Files
 .editorconfig
diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
index 62e0f50..bc76e00 100644
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -1 +1,2 @@
+github: orhun
 patreon: orhunp
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8d2b1be..823dad1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,15 +43,7 @@ jobs:
           override: true
 
       - name: Cache Cargo dependencies
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/bin/
-            ~/.cargo/registry/index/
-            ~/.cargo/registry/cache/
-            ~/.cargo/git/db/
-            target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }}
+        uses: Swatinem/rust-cache@v1
 
       - name: Build
         uses: actions-rs/cargo@v1
@@ -86,15 +78,7 @@ jobs:
           override: true
 
       - name: Cache Cargo dependencies
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/bin/
-            ~/.cargo/registry/index/
-            ~/.cargo/registry/cache/
-            ~/.cargo/git/db/
-            target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }}
+        uses: Swatinem/rust-cache@v1
 
       - name: Setup cargo-tarpaulin
         shell: bash
@@ -165,7 +149,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: clippy
-          args: -- -D warnings
+          args: --tests -- -D warnings
 
       - name: Run cargo-deny
         uses: EmbarkStudios/cargo-deny-action@v1
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 7ddd91b..7413ad5 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -22,7 +22,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v3
+        uses: docker/metadata-action@v4
         with:
           images: |
             orhunp/systeroid
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9dd0e82..01654d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,29 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.1] - 2022-08-30
+### Updated
+- Update the allowed licenses for cargo-deny
+- Add metadata for cargo-binstall
+- Remove unnecessary dirs dependency
+- Bump dependencies
+
+## [0.2.0] - 2022-08-11
+### Features
+- Add a configuration file ([#12](https://github.com/orhun/git-cliff/issues/12))
+  - See [configuration](https://github.com/orhun/systeroid#configuration) and [`systeroid.conf`](https://github.com/orhun/systeroid/blob/main/config/systeroid.conf)
+- (tui) Show deprecated values optionally via `--deprecated` flag
+
+### Documentation
+- Update broken links
+
+### Miscellaneous Tasks
+- Update MSRV to 1.57.0
+- Switch to Rust stable builds
+- Bump dependencies
+- Enable [GitHub Sponsors](https://github.com/sponsors/orhun) for funding
+  - Consider supporting my open source work 💖
+
 ## [0.1.1] - 2022-04-19
 ### Added
 - (cli) Support explaining multiple parameters
diff --git a/Cargo.lock b/Cargo.lock
index 21238c5..92ba694 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,6 +8,17 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
+[[package]]
+name = "ahash"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
+dependencies = [
+ "getrandom",
+ "once_cell",
+ "version_check",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.18"
@@ -67,12 +78,6 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df8670b8c7b9dae1793364eafadf7239c40d669904660c5960d74cfd80b46a53"
 
-[[package]]
-name = "cc"
-version = "1.0.73"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -102,15 +107,15 @@ dependencies = [
 
 [[package]]
 name = "colorsys"
-version = "0.6.5"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dfdf9179d546b55ff3f88c9d93ecfaa3e9760163da5a1080af5243230dbbb70"
+checksum = "52c2ad453c82bd637e3969dc52f06676610db0b20c607bf0634c7e9d840789e8"
 
 [[package]]
 name = "copypasta"
-version = "0.7.1"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4423d79fed83ebd9ab81ec21fa97144300a961782158287dc9bf7eddac37ff0b"
+checksum = "d7216b5c1e9ad3867252505995b02d01c6fa7e6db0d8abd42634352ef377777e"
 dependencies = [
  "clipboard-win",
  "objc",
@@ -122,9 +127,9 @@ dependencies = [
 
 [[package]]
 name = "copypasta-ext"
-version = "0.3.7"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc2f548212db51db2dba038e6e86c98a5d4a8ab0767ab230673a28be89a45b87"
+checksum = "af4c1c3f959cd8047b935d503c30e8bdfc9f7539493962ec3e45b9f0d305cbcc"
 dependencies = [
  "copypasta",
  "libc",
@@ -143,9 +148,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.2"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e54ea8bc3fb1ee042f5aace6e3c6e025d3874866da222930f70ce62aceba0bfa"
+checksum = "c2dd04ddaf88237dc3b8d8f9a3c1004b506b54b3313403944054d23c0870c521"
 dependencies = [
  "cfg-if",
  "crossbeam-utils",
@@ -153,9 +158,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6455c0ca19f0d2fbf751b908d5c55c1f5cbc65e03c4225427254b46890bdde1e"
+checksum = "715e8152b692bba2d374b53d4875445368fdf21a94751410af607a5ac677d1fc"
 dependencies = [
  "cfg-if",
  "crossbeam-epoch",
@@ -164,25 +169,26 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.7"
+version = "0.9.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c00d6d2ea26e8b151d99093005cb442fb9a37aeaca582a03ec70946f49ab5ed9"
+checksum = "045ebe27666471bb549370b4b0b3e51b07f56325befa4284db65fc89c02511b1"
 dependencies = [
+ "autocfg",
  "cfg-if",
  "crossbeam-utils",
- "lazy_static",
  "memoffset",
+ "once_cell",
  "scopeguard",
 ]
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.7"
+version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5e5bed1f1c269533fa816a0a5492b3545209a205ca1a54842be180eb63a16a6"
+checksum = "51887d4adc7b564537b15adcfb307936f8075dfcd5f00dde9a9f1d29383682bc"
 dependencies = [
  "cfg-if",
- "lazy_static",
+ "once_cell",
 ]
 
 [[package]]
@@ -215,6 +221,12 @@ dependencies = [
  "libloading",
 ]
 
+[[package]]
+name = "dlv-list"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0688c2a7f92e427f44895cd63841bff7b29f8d7a1648b9e7e07a4a365b2e1257"
+
 [[package]]
 name = "downcast-rs"
 version = "1.2.0"
@@ -223,19 +235,17 @@ checksum = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
 
 [[package]]
 name = "either"
-version = "1.6.1"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
+checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
 
 [[package]]
 name = "flate2"
-version = "1.0.22"
+version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e6988e897c1c9c485f43b47a529cef42fde0547f9d8d41a7062518f1d8fc53f"
+checksum = "f82b0f4c27ad9f8bfd1f3208d882da2b09c301bc1c828fd3a00d0216d2fbbff6"
 dependencies = [
- "cfg-if",
  "crc32fast",
- "libc",
  "miniz_oxide",
 ]
 
@@ -256,9 +266,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.5"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d39cd93900197114fa1fcb7ae84ca742095eed9442088988ae74fa744e930e77"
+checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
 dependencies = [
  "cfg-if",
  "libc",
@@ -267,9 +277,9 @@ dependencies = [
 
 [[package]]
 name = "globset"
-version = "0.4.8"
+version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10463d9ff00a2a068db14231982f5132edebad0d7660cd956a1c30292dbcbfbd"
+checksum = "0a1e17342619edbc21a964c2afbeb6c820c6a2560032872f397bb97ea127bd0a"
 dependencies = [
  "aho-corasick",
  "bstr",
@@ -289,6 +299,15 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+dependencies = [
+ "ahash",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -318,9 +337,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.1"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
+checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
 
 [[package]]
 name = "lazy-bytes-cast"
@@ -336,9 +355,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.119"
+version = "0.2.132"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bf2e165bb3457c8e098ea76f3e3bc9db55f87aa90d52d0e6be741470916aaa4"
+checksum = "8371e4e5341c3a96db127eb2465ac681ced4c433e01dd0e938adbef26ba93ba5"
 
 [[package]]
 name = "libloading"
@@ -352,9 +371,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.14"
+version = "0.4.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
 dependencies = [
  "cfg-if",
 ]
@@ -370,15 +389,15 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.4.1"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
 name = "memmap2"
-version = "0.3.1"
+version = "0.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b6c2ebff6180198788f5db08d7ce3bc1d0b617176678831a7510825973e357"
+checksum = "95af15f345b17af2efc8ead6080fb8bc376f8cec1b35277b935637595fe77498"
 dependencies = [
  "libc",
 ]
@@ -400,22 +419,20 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.4.4"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a92518e98c078586bc6c934028adcca4c92a53d6a958196de835170a01d84e4b"
+checksum = "6f5c75688da582b8ffc1f1799e9db273f32133c49e048f614d22ec3256773ccc"
 dependencies = [
  "adler",
- "autocfg",
 ]
 
 [[package]]
 name = "nix"
-version = "0.22.3"
+version = "0.24.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4916f159ed8e5de0082076562152a76b7a1f64a01fd9d1e0fea002c37624faf"
+checksum = "195cdbc1741b8134346d515b3a56a1c94b0912758009cfd53f99ea0f57b065fc"
 dependencies = [
  "bitflags",
- "cc",
  "cfg-if",
  "libc",
  "memoffset",
@@ -423,13 +440,12 @@ dependencies = [
 
 [[package]]
 name = "nom"
-version = "7.1.0"
+version = "7.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b1d11e1ef389c76fe5b81bcaf2ea32cf88b62bc494e19f493d0b30e7a930109"
+checksum = "a8903e5a29a317527874d0402f867152a3d21c908bb0b933e416c65e301d4c36"
 dependencies = [
  "memchr",
  "minimal-lexical",
- "version_check",
 ]
 
 [[package]]
@@ -479,15 +495,25 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.10.0"
+version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87f3e037eac156d1775da914196f0f37741a274155e34a0b7e427c35d2a2ecb9"
+checksum = "074864da206b4973b84eb91683020dbefd6a8c3f0f38e054d93954e891935e4e"
+
+[[package]]
+name = "ordered-multimap"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccd746e37177e1711c20dd619a1620f34f5c8b569c53590a72dedd5344d8924a"
+dependencies = [
+ "dlv-list",
+ "hashbrown",
+]
 
 [[package]]
 name = "parseit"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88b1326519874d2c452c203ca512d83be71b4703e8d848a9903f18771660f613"
+checksum = "efbe4a78e155d43f845fb833df08c11fa29701493a9d735d5119462313e6a97c"
 dependencies = [
  "flate2",
  "globwalk",
@@ -497,17 +523,17 @@ dependencies = [
 
 [[package]]
 name = "pkg-config"
-version = "0.3.24"
+version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58893f751c9b0412871a09abd62ecd2a00298c6c83befa223ef98c52aef40cbe"
+checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.36"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7342d5883fbccae1cc37a2353b09c87c9b0f3afd73f5fb9bba687a1f733b029"
+checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -521,18 +547,18 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.15"
+version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "864d3e96a899863136fc6e99f3d7cae289dafe43bf2c5ac19b70df7210c0a145"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
 dependencies = [
  "proc-macro2",
 ]
 
 [[package]]
 name = "rayon"
-version = "1.5.2"
+version = "1.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd249e82c21598a9a426a4e00dd7adc1d640b22445ec8545feef801d1a74c221"
+checksum = "bd99e5772ead8baa5215278c9b15bf92087709e9c1b2d1f97cdb5a183c933a7d"
 dependencies = [
  "autocfg",
  "crossbeam-deque",
@@ -542,9 +568,9 @@ dependencies = [
 
 [[package]]
 name = "rayon-core"
-version = "1.9.2"
+version = "1.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f51245e1e62e1f1629cbfec37b5793bbabcaeb90f30e94d2ba03564687353e4"
+checksum = "258bcdb5ac6dad48491bb2992db6b7cf74878b0384908af124823d118c99683f"
 dependencies = [
  "crossbeam-channel",
  "crossbeam-deque",
@@ -554,9 +580,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.11"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8380fe0152551244f0747b1bf41737e0f8a74f97a14ccefd1148187271634f3c"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
 dependencies = [
  "bitflags",
 ]
@@ -572,19 +598,20 @@ dependencies = [
 
 [[package]]
 name = "redox_users"
-version = "0.4.0"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "528532f3d801c87aec9def2add9ca802fe569e44a544afe633765267840abe64"
+checksum = "b033d837a7cf162d7993aded9304e30a83213c648b6e389db233191f891e5c2b"
 dependencies = [
  "getrandom",
  "redox_syscall",
+ "thiserror",
 ]
 
 [[package]]
 name = "regex"
-version = "1.5.5"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a11647b6b25ff05a515cb92c365cec08801e83423a235b51e231e1808747286"
+checksum = "4c4eb3267174b8c6c2f654116623910a0fef09c4753f8dd83db29c48a0df988b"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -593,15 +620,25 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.25"
+version = "0.6.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
+checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
+
+[[package]]
+name = "rust-ini"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6d5f2436026b4f6e79dc829837d467cc7e9a55ee40e750d716713540715a2df"
+dependencies = [
+ "cfg-if",
+ "ordered-multimap",
+]
 
 [[package]]
 name = "ryu"
-version = "1.0.9"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73b4b750c782965c211b42f022f59af1fbceabdd026623714f104152f1ec149f"
+checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
 
 [[package]]
 name = "same-file"
@@ -626,18 +663,18 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "serde"
-version = "1.0.136"
+version = "1.0.144"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce31e24b01e1e524df96f1c2fdd054405f8d7376249a5110886fb4b658484789"
+checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.136"
+version = "1.0.144"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08597e7152fcd306f41838ed3e37be9eaeed2b61c42e2117266a554fab4662f9"
+checksum = "94ed3a816fb1d101812f83e789f888322c34e291f894f19590dc310963e87a00"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -646,9 +683,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.79"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e8d9fa5c3b304765ce1fd9c4c8a3de2c8db365a5b91be52f186efc675681d95"
+checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
 dependencies = [
  "itoa",
  "ryu",
@@ -657,15 +694,15 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.8.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
+checksum = "2fd0db749597d91ff862fd1d55ea87f7855a744a8425a64695b6fca237d1dad1"
 
 [[package]]
 name = "smithay-client-toolkit"
-version = "0.15.3"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1325f292209cee78d5035530932422a30aa4c8fda1a16593ac083c1de211e68a"
+checksum = "f307c47d32d2715eb2e0ece5589057820e0e5e70d07c247d1063e844e107f454"
 dependencies = [
  "bitflags",
  "dlib",
@@ -681,9 +718,9 @@ dependencies = [
 
 [[package]]
 name = "smithay-clipboard"
-version = "0.6.5"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "610b551bd25378bfd2b8e7a0fcbd83d427e8f2f6a40c47ae0f70688e9949dd55"
+checksum = "0a345c870a1fae0b1b779085e81b51e614767c239e93503588e54c5b17f4b0e8"
 dependencies = [
  "smithay-client-toolkit",
  "wayland-client",
@@ -691,20 +728,20 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.86"
+version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "sysctl"
-version = "0.4.4"
+version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1123645dfaf2b5eac6b6c88addafc359c789b8ef2a770ecaef758c1ddf363ea4"
+checksum = "f99d037b2bef227ab8963f4b0acc33ecbb1f9a2e7365add7789372b387ec19e1"
 dependencies = [
  "bitflags",
  "byteorder",
@@ -715,7 +752,7 @@ dependencies = [
 
 [[package]]
 name = "systeroid"
-version = "0.1.1"
+version = "0.2.1"
 dependencies = [
  "getopts",
  "systeroid-core",
@@ -723,13 +760,14 @@ dependencies = [
 
 [[package]]
 name = "systeroid-core"
-version = "0.1.1"
+version = "0.2.1"
 dependencies = [
  "colored",
  "dirs-next",
  "lazy_static",
  "parseit",
  "rayon",
+ "rust-ini",
  "serde",
  "serde_json",
  "sysctl",
@@ -738,7 +776,7 @@ dependencies = [
 
 [[package]]
 name = "systeroid-tui"
-version = "0.1.1"
+version = "0.2.1"
 dependencies = [
  "colorsys",
  "copypasta-ext",
@@ -764,18 +802,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.30"
+version = "1.0.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
+checksum = "8c1b05ca9d106ba7d2e31a9dab4a64e7be2cce415321966ea3132c49a656e252"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.30"
+version = "1.0.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
+checksum = "e8f2591983642de85c921015f3f070c665a197ed69e417af436115e3a1407487"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -793,9 +831,9 @@ dependencies = [
 
 [[package]]
 name = "tui"
-version = "0.18.0"
+version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96fe69244ec2af261bced1d9046a6fee6c8c2a6b0228e59e5ba39bc8ba4ed729"
+checksum = "ccdd26cbd674007e649a272da4475fb666d3aa0ad0531da7136db6fab0e5bad1"
 dependencies = [
  "bitflags",
  "cassowary",
@@ -804,6 +842,12 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.9.0"
@@ -816,12 +860,6 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
 
-[[package]]
-name = "unicode-xid"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
-
 [[package]]
 name = "version_check"
 version = "0.9.4"
@@ -841,15 +879,15 @@ dependencies = [
 
 [[package]]
 name = "wasi"
-version = "0.10.2+wasi-snapshot-preview1"
+version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wayland-client"
-version = "0.29.4"
+version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91223460e73257f697d9e23d401279123d36039a3f7a449e983f123292d4458f"
+checksum = "3f3b068c05a039c9f755f881dc50f01732214f5685e379829759088967c46715"
 dependencies = [
  "bitflags",
  "downcast-rs",
@@ -863,9 +901,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-commons"
-version = "0.29.4"
+version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94f6e5e340d7c13490eca867898c4cec5af56c27a5ffe5c80c6fc4708e22d33e"
+checksum = "8691f134d584a33a6606d9d717b95c4fa20065605f798a3f350d78dced02a902"
 dependencies = [
  "nix",
  "once_cell",
@@ -875,9 +913,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-cursor"
-version = "0.29.4"
+version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c52758f13d5e7861fc83d942d3d99bf270c83269575e52ac29e5b73cb956a6bd"
+checksum = "6865c6b66f13d6257bef1cd40cbfe8ef2f150fb8ebbdb1e8e873455931377661"
 dependencies = [
  "nix",
  "wayland-client",
@@ -886,9 +924,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-protocols"
-version = "0.29.4"
+version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60147ae23303402e41fe034f74fb2c35ad0780ee88a1c40ac09a3be1e7465741"
+checksum = "b950621f9354b322ee817a23474e479b34be96c2e909c14f7bc0100e9a970bc6"
 dependencies = [
  "bitflags",
  "wayland-client",
@@ -898,9 +936,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-scanner"
-version = "0.29.4"
+version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39a1ed3143f7a143187156a2ab52742e89dac33245ba505c17224df48939f9e0"
+checksum = "8f4303d8fa22ab852f789e75a967f0a2cdc430a607751c0499bada3e451cbd53"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -909,9 +947,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-sys"
-version = "0.29.4"
+version = "0.29.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9341df79a8975679188e37dab3889bfa57c44ac2cb6da166f519a81cbe452d4"
+checksum = "be12ce1a3c39ec7dba25594b97b42cb3195d54953ddb9d3d95a7c3902bc6e9d4"
 dependencies = [
  "dlib",
  "lazy_static",
@@ -920,9 +958,9 @@ dependencies = [
 
 [[package]]
 name = "which"
-version = "4.2.4"
+version = "4.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a5a7e487e921cf220206864a94a89b6c6905bfc19f1057fa26a4cb360e5c1d2"
+checksum = "5c4fb54e6113b6a8772ee41c3404fb0301ac79604489467e0a9ce1f3e97c24ae"
 dependencies = [
  "either",
  "lazy_static",
@@ -962,21 +1000,21 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "x11-clipboard"
-version = "0.5.3"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "473068b7b80ac86a18328824f1054e5e007898c47b5bbc281bd7abe32bc3653c"
+checksum = "6a7468a5768fea473e6c8c0d4b60d6d7001a64acceaac267207ca0281e1337e8"
 dependencies = [
  "xcb",
 ]
 
 [[package]]
 name = "xcb"
-version = "0.10.1"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "771e2b996df720cd1c6dd9ff90f62d91698fd3610cc078388d0564bdd6622a9c"
+checksum = "b127bf5bfe9dbb39118d6567e3773d4bbc795411a8e1ef7b7e056bccac0011a9"
 dependencies = [
+ "bitflags",
  "libc",
- "log",
  "quick-xml",
 ]
 
diff --git a/README.md b/README.md
index 5c62561..e73f145 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,7 @@ Although **systeroid** does not need the parameter section to be specified expli
     - [Changing the colors](#changing-the-colors)
     - [Viewing the parameter documentation](#viewing-the-parameter-documentation)
     - [Setting the refresh rate](#setting-the-refresh-rate)
+- [Configuration](#configuration)
 - [Resources](#resources)
   - [References](#references)
   - [Logo](#logo)
@@ -215,6 +216,7 @@ systeroid [options] [variable[=value] ...] --load[=<file>]
 -P, --no-pager      do not pipe output into a pager
 -v, --verbose       enable verbose logging
     --tui           show terminal user interface
+-c, --config <path> set the path of the configuration file
 -h, --help          display this help and exit (-d)
 -V, --version       output version information and exit
 ```
@@ -415,6 +417,8 @@ systeroid-tui [options]
     --fg-color <color>
                     set the foreground color [default: white]
 -n, --no-docs       do not show the kernel documentation
+    --deprecated    include deprecated variables while listing
+-c, --config <path> set the path of the configuration file
 -h, --help          display this help and exit
 -V, --version       output version information and exit
 ```
@@ -547,6 +551,28 @@ It is possible to specify a value in milliseconds via `--tick-rate` argument for
 systeroid-tui --tick-rate 500
 ```
 
+## Configuration
+
+**systeroid** can be configured with a configuration file that uses the [INI format](https://en.wikipedia.org/wiki/INI_file). It can be specified via `--config` or `SYSTEROID_CONFIG` environment variable. It can also be placed in one of the following global locations:
+
+- `$HOME/.config/systeroid/systeroid.conf`
+- `$HOME/.systeroid/systeroid.conf`
+
+```sh
+# set the config path via argument
+systeroid --config config/systeroid.conf
+
+# set the config path via env
+SYSTEROID_CONFIG=config/systeroid.conf systeroid
+
+# use a global path
+mkdir -p "$HOME/.config/systeroid"
+cp config/systeroid.conf "$HOME/.config/systeroid"
+systeroid
+```
+
+See the example [systeroid.conf](./config/systeroid.conf) for the configuration options.
+
 ## Resources
 
 ### References
@@ -557,9 +583,7 @@ systeroid-tui --tick-rate 500
 
 ### Logo
 
-**systeroid** logo was originally painted by [Ryan Tippery](https://www.ryantippery.com/about) as a part of the [Compositions](https://www.ryantippery.com/compositions/) art collection and it is put together by me using the [Filled Spots](https://www.fontspace.com/filled-spots-font-f30755) font. Shout out to Ryan for letting me use his painting for the logo! **<3**
-
-Check out his [store](https://www.ryantippery.com/store) for a fine piece of similar art. Kudos!
+**systeroid** logo was originally painted by [Ryan Tippery](https://ryantippery.com) as a part of the [Compositions](https://ryantippery.com/art/compositions) art collection and it is put together by me using the [Filled Spots](https://www.fontspace.com/filled-spots-font-f30755) font. Shout out to Ryan for letting me use his painting for the logo! **<3** Kudos!
 
 ### Social Links
 
@@ -570,7 +594,7 @@ Check out his [store](https://www.ryantippery.com/store) for a fine piece of sim
 
 ### Funding
 
-If you find **systeroid** and/or other projects on my [GitHub profile](https://github.com/orhun/) useful, consider [becoming a patron](https://www.patreon.com/join/orhunp)!
+If you find **systeroid** and/or other projects on my [GitHub profile](https://github.com/orhun/) useful, consider supporting me on [GitHub Sponsors](https://github.com/sponsors/orhun) or [becoming a patron](https://www.patreon.com/join/orhunp)!
 
 [![Support me on Patreon](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.vercel.app%2Fapi%3Fusername%3Dorhunp%26type%3Dpatrons&style=flat&logo=Patreon&labelColor=000000&color=CECDCB&logoColor=CECDCB)](https://patreon.com/join/orhunp)
 [![Support me on Patreon](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.vercel.app%2Fapi%3Fusername%3Dorhunp%26type%3Dpledges&style=flat&logo=Patreon&labelColor=000000&color=CECDCB&logoColor=CECDCB&label=)](https://patreon.com/join/orhunp)
diff --git a/bors.toml b/bors.toml
index 1c66d3d..cd06ebd 100644
--- a/bors.toml
+++ b/bors.toml
@@ -18,6 +18,6 @@ up_to_date_approvals = true
 delete_merged_branches = true
 update_base_for_deletes = true
 use_codeowners = true
-use_squash_merge = true
 commit_title = "Merge ${PR_REFS}"
 timeout_sec = 36000
+cut_body_after = "<details>"
diff --git a/config/systeroid.conf b/config/systeroid.conf
new file mode 100644
index 0000000..ff21342
--- /dev/null
+++ b/config/systeroid.conf
@@ -0,0 +1,66 @@
+; systeroid ~ configuration file
+; https://github.com/orhun/systeroid
+;
+; Each line either contains a comment or a command line argument grouped under a section.
+; Run "systeroid --help" or "systeroid-tui --help" to get a list of all possible configuration options.
+
+[general]
+; display the deprecated parameters such as base_reachable_time and retrans_time while listing
+; See https://bugzilla.redhat.com/show_bug.cgi?id=152435
+display_deprecated = false
+; path of the Linux kernel documentation
+; this is distro dependent, systeroid checks the following locations as default:
+; - /usr/share/doc/linux/
+; - /usr/share/doc/linux-doc/
+; - /usr/share/doc/linux-docs/
+; - /usr/share/doc/kernel-doc-*/Documentation/
+kernel_docs = "/usr/share/doc/linux"
+
+[cli]
+; enable verbose logging
+verbose = false
+; ignore unknown variable errors
+ignore_errors = true
+; do not print variable after the value is set
+quiet = false
+; do not pipe output into a pager
+; note that the default pager is less(1) and you can change it by using `PAGER` environment variable
+no_pager = false
+; display type for the parameter, available options are:
+; - default: print the parameter name along with its value
+; - name: print only the name of the parameter
+; - value: print only the value of the parameter
+; - binary: print only the value of the parameter without new line
+display_type = "default"
+; output type for the list, available options are:
+; - default: print the output as is
+; - tree: print the output in a tree-like format
+; - json: print the output in JSON format
+output_type = "default"
+
+[cli.colors]
+; available colors are defined in https://docs.rs/colored/latest/colored/enum.Color.html
+; default color for the symbols
+default_color = "bright black"
+; section colors
+section_abi = "red"
+section_fs = "green"
+section_kernel = "magenta"
+section_net = "blue"
+section_sunrpc = "yellow"
+section_user = "cyan"
+section_vm = "bright red"
+section_unknown = "white"
+
+[tui]
+; tick rate of the terminal
+tick_rate = 250
+; disable showing the parameter documentation
+no_docs = true
+
+[tui.colors]
+; available colors are defined in https://docs.rs/tui/latest/tui/style/enum.Color.html
+; terminal foreground color
+fg_color = "white"
+; terminal background color
+bg_color = "black"
diff --git a/deny.toml b/deny.toml
index a0d8927..fa3ff73 100644
--- a/deny.toml
+++ b/deny.toml
@@ -8,7 +8,8 @@ allow = [
     "Apache-2.0",
     "BSL-1.0",
     "MPL-2.0",
-    "ISC"
+    "ISC",
+    "Unicode-DFS-2016"
 ]
 
 [sources]
diff --git a/man8/systeroid-tui.8 b/man8/systeroid-tui.8
index 1f885d8..04e74b7 100644
--- a/man8/systeroid-tui.8
+++ b/man8/systeroid-tui.8
@@ -1,6 +1,6 @@
 .\" Manpage for systeroid-tui
 
-.TH SYSTEROID-TUI "8" "2022-04-19" "systeroid-tui" "System Administration"
+.TH SYSTEROID-TUI "8" "2022-08-30" "systeroid-tui" "System Administration"
 .SH NAME
 systeroid-tui \- manage kernel parameters with a terminal user interface
 
@@ -34,6 +34,9 @@ Use this option to set the foreground color. [default: white]
 \fB\-n\fR, \fB\-\-no\-docs\fR
 Do not show the kernel documentation.
 .TP
+\fB\-\-deprecated\fR
+Include deprecated variables while listing.
+.TP
 \fB\-h\fR, \fB\-\-help\fR
 Display help text and exit.
 .TP
diff --git a/man8/systeroid.8 b/man8/systeroid.8
index 5cb7bb1..b1bfda7 100644
--- a/man8/systeroid.8
+++ b/man8/systeroid.8
@@ -1,6 +1,6 @@
 .\" Manpage for systeroid
 
-.TH SYSTEROID "8" "2022-04-19" "systeroid" "System Administration"
+.TH SYSTEROID "8" "2022-08-30" "systeroid" "System Administration"
 .SH NAME
 systeroid \- configure kernel parameters at runtime
 
diff --git a/systeroid-core/Cargo.toml b/systeroid-core/Cargo.toml
index 432e396..106c7a9 100644
--- a/systeroid-core/Cargo.toml
+++ b/systeroid-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "systeroid-core"
-version = "0.1.1" # managed by release.sh
+version = "0.2.1" # managed by release.sh
 description = "Core library of systeroid"
 authors = ["Orhun Parmaksız <orhunparmaksiz@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -12,12 +12,13 @@ edition = "2021"
 rust-version = "1.56.1"
 
 [dependencies]
-sysctl = "0.4.4"
-thiserror = "1.0.29"
+sysctl = "0.5.2"
+thiserror = "1.0.34"
 lazy_static = "1.4.0"
-rayon = "1.5.2"
+rayon = "1.5.3"
 colored = "2.0.0"
-serde = { version = "1.0.136", features = ["derive"] }
-serde_json = "1.0.79"
+serde = { version = "1.0.144", features = ["derive"] }
+serde_json = "1.0.85"
 dirs-next = "2.0.0"
-parseit = { version = "0.1.0", features = ["gzip"] }
+parseit = { version = "0.1.1", features = ["gzip"] }
+rust-ini = "0.18.0"
diff --git a/systeroid-core/src/config.rs b/systeroid-core/src/config.rs
index d0e4c44..a33ed73 100644
--- a/systeroid-core/src/config.rs
+++ b/systeroid-core/src/config.rs
@@ -1,9 +1,26 @@
-use crate::sysctl::display::DisplayType;
+use crate::error::Result;
+use crate::sysctl::r#type::{DisplayType, OutputType};
 use crate::sysctl::section::Section;
 use colored::Color;
+use ini::Ini;
 use std::collections::HashMap;
+use std::path::PathBuf;
 
-/* Macro for the concise initialization of HashMap */
+/// Default configuration file.
+pub const DEFAULT_CONFIG: &str = "systeroid.conf";
+
+/// Environment variable for setting the path of the configuration file.
+pub const CONFIG_ENV: &str = "SYSTEROID_CONFIG";
+
+lazy_static! {
+    /// Default locations for the configuration file.
+    pub static ref DEFAULT_CONFIG_PATHS: Vec<Option<PathBuf>> = vec![
+        dirs_next::config_dir().map(|p| p.join("systeroid").join(DEFAULT_CONFIG)),
+        dirs_next::home_dir().map(|p| p.join(".systeroid").join(DEFAULT_CONFIG)),
+    ];
+}
+
+/// Macro for the concise initialization of HashMap
 macro_rules! map {
     ($( $key: expr => $val: expr ),*) => {{
          let mut map = ::std::collections::HashMap::new();
@@ -12,9 +29,31 @@ macro_rules! map {
     }}
 }
 
+/// Macro for parsing a boolean value from INI format
+macro_rules! parse_ini_flag {
+    ($self: ident, $config: ident, $section: ident, $name: ident) => {
+        if let Some($name) = $section.get(stringify!($name)) {
+            $self.$config.$name = $name == "true";
+        }
+    };
+}
+
 /// Configuration.
 #[derive(Clone, Debug)]
 pub struct Config {
+    /// Whether if the deprecated variables should be included while listing.
+    pub display_deprecated: bool,
+    /// Path of the Linux kernel documentation.
+    pub kernel_docs: Option<PathBuf>,
+    /// CLI configuration.
+    pub cli: CliConfig,
+    /// TUI configuration.
+    pub tui: TuiConfig,
+}
+
+/// CLI configuration.
+#[derive(Clone, Debug)]
+pub struct CliConfig {
     /// Whether if the verbose logging is enabled.
     pub verbose: bool,
     /// Whether if the errors should be ignored.
@@ -23,33 +62,196 @@ pub struct Config {
     pub quiet: bool,
     /// Whether if the pager is disabled.
     pub no_pager: bool,
-    /// Sections and the corresponding colors.
-    pub section_colors: HashMap<Section, Color>,
-    /// Default color for the output
-    pub default_color: Color,
     /// Display type of the kernel parameters.
     pub display_type: DisplayType,
+    /// Output type of the application.
+    pub output_type: OutputType,
+    /// Color configuration.
+    pub color: CliColorConfig,
+}
+
+/// CLI color configuration.
+#[derive(Clone, Debug)]
+pub struct CliColorConfig {
+    /// Default color for the output
+    pub default_color: Color,
+    /// Sections and the corresponding colors.
+    pub section_colors: HashMap<Section, Color>,
+}
+
+/// TUI configuration.
+#[derive(Clone, Debug)]
+pub struct TuiConfig {
+    /// Refresh rate of the terminal.
+    pub tick_rate: u64,
+    /// Do not parse/show Linux kernel documentation.
+    pub no_docs: bool,
+    /// Color configuration.
+    pub color: TuiColorConfig,
+}
+
+/// TUI color configuration.
+#[derive(Clone, Debug)]
+pub struct TuiColorConfig {
+    /// Foreground color.
+    pub fg_color: String,
+    /// Background color.
+    pub bg_color: String,
+}
+
+impl Config {
+    /// Parses the configuration file and overrides values.
+    pub fn parse(&mut self, path: Option<PathBuf>) -> Result<()> {
+        let mut config_paths = DEFAULT_CONFIG_PATHS.clone();
+        if path.is_some() {
+            config_paths.insert(0, path);
+        }
+        let mut config_path = None;
+        for path in config_paths.into_iter().flatten() {
+            if path.exists() {
+                config_path = Some(path);
+                break;
+            }
+        }
+        if let Some(path) = config_path {
+            let ini = Ini::load_from_file(path)?;
+            if let Some(general_section) = ini.section(Some("general")) {
+                if let Some(display_deprecated) = general_section.get("display_deprecated") {
+                    self.display_deprecated = display_deprecated == "true";
+                }
+                if let Some(kernel_docs) = general_section.get("kernel_docs") {
+                    self.kernel_docs = Some(PathBuf::from(kernel_docs));
+                }
+            }
+            if let Some(section) = ini.section(Some("cli")) {
+                parse_ini_flag!(self, cli, section, verbose);
+                parse_ini_flag!(self, cli, section, ignore_errors);
+                parse_ini_flag!(self, cli, section, quiet);
+                parse_ini_flag!(self, cli, section, no_pager);
+                if let Some(display_type) = section.get("display_type").map(DisplayType::from) {
+                    self.cli.display_type = display_type;
+                }
+                if let Some(output_type) = section.get("output_type").map(OutputType::from) {
+                    self.cli.output_type = output_type;
+                }
+            }
+            if let Some(section) = ini.section(Some("cli.colors")) {
+                if let Some(default_color) = section
+                    .get("default_color")
+                    .and_then(|v| Color::try_from(v).ok())
+                {
+                    self.cli.color.default_color = default_color;
+                }
+                for (key, value) in section.iter() {
+                    if key.starts_with("section_") {
+                        if let (sysctl_section, Some(color)) = (
+                            Section::from(key.trim_start_matches("section_").to_string()),
+                            Color::try_from(value).ok(),
+                        ) {
+                            self.cli.color.section_colors.insert(sysctl_section, color);
+                        }
+                    }
+                }
+            }
+            if let Some(section) = ini.section(Some("tui")) {
+                if let Some(tick_rate) = section.get("tick_rate").and_then(|v| v.parse().ok()) {
+                    self.tui.tick_rate = tick_rate;
+                }
+                parse_ini_flag!(self, tui, section, no_docs);
+            }
+            if let Some(section) = ini.section(Some("tui.colors")) {
+                if let Some(fg_color) = section.get("fg_color") {
+                    self.tui.color.fg_color = fg_color.to_string();
+                }
+                if let Some(bg_color) = section.get("bg_color") {
+                    self.tui.color.bg_color = bg_color.to_string();
+                }
+            }
+        }
+        Ok(())
+    }
 }
 
 impl Default for Config {
     fn default() -> Self {
         Self {
-            verbose: false,
-            ignore_errors: false,
-            quiet: false,
-            no_pager: false,
-            section_colors: map! {
-                Section::Abi => Color::Red,
-                Section::Fs => Color::Green,
-                Section::Kernel => Color::Magenta,
-                Section::Net => Color::Blue,
-                Section::Sunrpc => Color::Yellow,
-                Section::User => Color::Cyan,
-                Section::Vm => Color::BrightRed,
-                Section::Unknown => Color::White
+            display_deprecated: false,
+            kernel_docs: None,
+            cli: CliConfig {
+                verbose: false,
+                ignore_errors: false,
+                quiet: false,
+                no_pager: false,
+                display_type: DisplayType::Default,
+                output_type: OutputType::Default,
+                color: CliColorConfig {
+                    default_color: Color::BrightBlack,
+                    section_colors: map! {
+                        Section::Abi => Color::Red,
+                        Section::Fs => Color::Green,
+                        Section::Kernel => Color::Magenta,
+                        Section::Net => Color::Blue,
+                        Section::Sunrpc => Color::Yellow,
+                        Section::User => Color::Cyan,
+                        Section::Vm => Color::BrightRed,
+                        Section::Unknown => Color::White
+                    },
+                },
+            },
+            tui: TuiConfig {
+                tick_rate: 250,
+                no_docs: false,
+                color: TuiColorConfig {
+                    fg_color: String::from("white"),
+                    bg_color: String::from("black"),
+                },
             },
-            default_color: Color::BrightBlack,
-            display_type: DisplayType::default(),
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_config() -> Result<()> {
+        let mut config = Config {
+            display_deprecated: true,
+            ..Default::default()
+        };
+        config.cli.display_type = DisplayType::Value;
+        config.cli.color.default_color = Color::Blue;
+        config.cli.color.section_colors = HashMap::new();
+        config.tui.tick_rate = 3000;
+        config.tui.color.fg_color = String::new();
+        let path = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .parent()
+            .expect("parent directory not found")
+            .join("config")
+            .join(DEFAULT_CONFIG);
+        config.parse(Some(path))?;
+        assert_eq!(
+            Config::default().display_deprecated,
+            config.display_deprecated
+        );
+        assert_eq!(
+            Some(PathBuf::from("/usr/share/doc/linux")),
+            config.kernel_docs
+        );
+        assert_eq!(Config::default().cli.display_type, config.cli.display_type);
+        assert_eq!(
+            Config::default().cli.color.default_color,
+            config.cli.color.default_color
+        );
+        assert_eq!(
+            Config::default().cli.color.section_colors,
+            config.cli.color.section_colors
+        );
+        assert_eq!(Config::default().tui.tick_rate, config.tui.tick_rate);
+        assert_eq!(
+            Config::default().tui.color.fg_color,
+            config.tui.color.fg_color
+        );
+        Ok(())
+    }
+}
diff --git a/systeroid-core/src/error.rs b/systeroid-core/src/error.rs
index 9d3f5ed..524865d 100644
--- a/systeroid-core/src/error.rs
+++ b/systeroid-core/src/error.rs
@@ -24,6 +24,9 @@ pub enum Error {
     /// Error that may occur while handling sysctl operations.
     #[error("sysctl error: `{0}`")]
     SysctlError(#[from] sysctl::SysctlError),
+    /// Error that may occur while parsing an INI document.
+    #[error("INI parsing error: `{0}`")]
+    IniError(#[from] ini::Error),
 }
 
 /// Type alias for the standard [`Result`] type.
diff --git a/systeroid-core/src/sysctl/controller.rs b/systeroid-core/src/sysctl/controller.rs
index 700176b..6df4587 100644
--- a/systeroid-core/src/sysctl/controller.rs
+++ b/systeroid-core/src/sysctl/controller.rs
@@ -4,12 +4,13 @@ use crate::error::Result;
 use crate::parsers::{parse_kernel_docs, KERNEL_DOCS_PATH};
 use crate::sysctl::parameter::Parameter;
 use crate::sysctl::section::Section;
+use crate::sysctl::DEPRECATED_PARAMS;
 use crate::sysctl::{DISABLE_CACHE_ENV, PARAMETERS_CACHE_LABEL, PROC_PATH};
 use parseit::globwalk;
 use rayon::prelude::*;
 use std::convert::TryFrom;
 use std::env;
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::result::Result as StdResult;
 use sysctl::{CtlFlags, CtlIter, Sysctl as SysctlImpl};
 
@@ -33,10 +34,20 @@ impl Sysctl {
         }) {
             match Parameter::try_from(&ctl) {
                 Ok(parameter) => {
-                    parameters.push(parameter);
+                    if !config.display_deprecated {
+                        let mut skip_param = false;
+                        if let Some(param_name) = parameter.get_absolute_name() {
+                            skip_param = DEPRECATED_PARAMS.contains(&param_name);
+                        }
+                        if !skip_param {
+                            parameters.push(parameter);
+                        }
+                    } else {
+                        parameters.push(parameter);
+                    }
                 }
                 Err(e) => {
-                    if config.verbose {
+                    if config.cli.verbose {
                         eprintln!("{} ({})", e, ctl.name()?);
                     }
                 }
@@ -48,21 +59,22 @@ impl Sysctl {
     /// Returns the first found parameter in the available parameters.
     #[cfg(test)]
     fn get_parameter(&self, query: &str) -> Option<&Parameter> {
-        self.get_parameters(query).first().map(|v| *v)
+        self.get_parameters(query).first().copied()
     }
 
     /// Returns the parameters that matches the given query.
     pub fn get_parameters(&self, query: &str) -> Vec<&Parameter> {
+        let query = query.replace('/', ".");
         let parameters = self
             .parameters
             .iter()
             .filter(|param| {
-                param.name == query.replace('/', ".")
-                    || param.section.to_string() == query
-                    || param.get_absolute_name() == Some(&query.replace('/', "."))
+                param.name == query
+                    || param.get_absolute_name() == Some(&query)
+                    || param.is_in_section(&query)
             })
             .collect::<Vec<&Parameter>>();
-        if parameters.is_empty() && !self.config.ignore_errors {
+        if parameters.is_empty() && !self.config.cli.ignore_errors {
             eprintln!(
                 "{}: cannot stat {}{}: No such file or directory",
                 env!("CARGO_PKG_NAME").split('-').collect::<Vec<_>>()[0],
@@ -74,12 +86,8 @@ impl Sysctl {
     }
 
     /// Updates the descriptions of the kernel parameters using the given cached data.
-    pub fn update_docs_from_cache(
-        &mut self,
-        kernel_docs: Option<&PathBuf>,
-        cache: &Cache,
-    ) -> Result<()> {
-        let mut kernel_docs_path = if let Some(path) = kernel_docs {
+    pub fn update_docs_from_cache(&mut self, cache: &Cache) -> Result<()> {
+        let mut kernel_docs_path = if let Some(path) = &self.config.kernel_docs {
             vec![path.to_path_buf()]
         } else {
             Vec::new()
@@ -119,17 +127,17 @@ impl Sysctl {
     /// Updates the parameters internally using the given list.
     ///
     /// Keeps the original values.
-    fn update_params(&mut self, mut parameters: Vec<Parameter>) {
-        parameters.par_iter_mut().for_each(|parameter| {
-            if let Some(param) = self
-                .parameters
+    fn update_params(&mut self, parameters: Vec<Parameter>) {
+        self.parameters.par_iter_mut().for_each(|parameter| {
+            if let Some(param) = parameters
                 .par_iter()
                 .find_any(|param| param.name == parameter.name)
             {
-                parameter.value = param.value.to_string();
+                parameter.description = param.description.clone();
+                parameter.docs_path = param.docs_path.clone();
+                parameter.docs_title = param.docs_title.clone();
             }
         });
-        self.parameters = parameters;
     }
 
     /// Updates the descriptions of the kernel parameters.
@@ -178,21 +186,27 @@ mod tests {
         assert!(sysctl.get_parameter("kernel.hostname").is_some());
         assert!(sysctl.get_parameter("unexisting.param").is_none());
         assert_eq!(
-            "Linux",
-            sysctl.get_parameters("ostype").first().unwrap().value
+            Some(String::from("Linux")),
+            sysctl
+                .get_parameters("ostype")
+                .first()
+                .map(|v| v.value.to_string())
         );
         assert!(sysctl.get_parameters("---").is_empty());
 
-        sysctl.update_docs_from_cache(None, &Cache::init()?)?;
+        sysctl.update_docs_from_cache(&Cache::init()?)?;
 
-        let parameter = sysctl.get_parameter("kernel.hostname").unwrap().clone();
+        let parameter = sysctl
+            .get_parameter("kernel.hostname")
+            .expect("failed to get parameter")
+            .clone();
         let old_value = parameter.docs_title;
         let parameters = sysctl.parameters.clone();
         sysctl
             .parameters
             .iter_mut()
             .find(|param| param.name == parameter.name)
-            .unwrap()
+            .expect("parameter not found")
             .docs_title = String::from("-");
         sysctl.update_params(parameters);
         assert_eq!(
@@ -201,24 +215,24 @@ mod tests {
                 .parameters
                 .iter_mut()
                 .find(|param| param.name == parameter.name)
-                .unwrap()
+                .expect("parameter not found")
                 .docs_title
         );
 
         assert!(sysctl
             .get_parameter("vm.zone_reclaim_mode")
-            .unwrap()
+            .expect("failed to get parameter")
             .description
             .as_ref()
-            .unwrap()
+            .expect("parameter has no description")
             .contains("zone_reclaim_mode is disabled by default."));
 
         assert!(sysctl
             .get_parameter("user.max_user_namespaces")
-            .unwrap()
+            .expect("failed to get parameter")
             .description
             .as_ref()
-            .unwrap()
+            .expect("parameter has no description")
             .contains("The maximum number of user namespaces"));
 
         Ok(())
diff --git a/systeroid-core/src/sysctl/display.rs b/systeroid-core/src/sysctl/display.rs
deleted file mode 100644
index a408550..0000000
--- a/systeroid-core/src/sysctl/display.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-/// Possible ways of displaying the kernel parameters.
-#[derive(Clone, Debug, Eq, PartialEq)]
-pub enum DisplayType {
-    /// Print the kernel parameter name along with its value.
-    Default,
-    /// Print only the name of the parameter.
-    Name,
-    /// Print only the value of the parameter.
-    Value,
-    /// Print only the value of the parameter without new line.
-    Binary,
-}
-
-impl Default for DisplayType {
-    fn default() -> Self {
-        Self::Default
-    }
-}
diff --git a/systeroid-core/src/sysctl/mod.rs b/systeroid-core/src/sysctl/mod.rs
index 394e756..04a3339 100644
--- a/systeroid-core/src/sysctl/mod.rs
+++ b/systeroid-core/src/sysctl/mod.rs
@@ -4,8 +4,8 @@ pub mod controller;
 /// Sysctl section.
 pub mod section;
 
-/// Sysctl display options.
-pub mod display;
+/// Sysctl display/output options.
+pub mod r#type;
 
 /// Kernel parameter.
 pub mod parameter;
diff --git a/systeroid-core/src/sysctl/parameter.rs b/systeroid-core/src/sysctl/parameter.rs
index d89103c..0ad7fbc 100644
--- a/systeroid-core/src/sysctl/parameter.rs
+++ b/systeroid-core/src/sysctl/parameter.rs
@@ -1,9 +1,10 @@
 use crate::config::Config;
 use crate::error::Result;
-use crate::sysctl::display::DisplayType;
+use crate::sysctl::r#type::DisplayType;
 use crate::sysctl::section::Section;
 use colored::*;
 use serde::{Deserialize, Serialize};
+use std::fmt::Write as _;
 use std::io::Write;
 use std::path::PathBuf;
 use sysctl::{Ctl, Sysctl as SysctlImpl};
@@ -52,19 +53,22 @@ impl Parameter {
     /// Returns the parameter name with corresponding section colors.
     pub fn get_colored_name(&self, config: &Config) -> String {
         let section_color = *(config
+            .cli
+            .color
             .section_colors
             .get(&self.section)
-            .unwrap_or(&config.default_color));
+            .unwrap_or(&config.cli.color.default_color));
         let fields = self.name.split('.').collect::<Vec<&str>>();
         fields
             .iter()
             .enumerate()
             .fold(String::new(), |mut result, (i, v)| {
                 if i != fields.len() - 1 {
-                    result += &format!(
+                    let _ = write!(
+                        result,
                         "{}{}",
                         v.color(section_color),
-                        ".".color(config.default_color)
+                        ".".color(config.cli.color.default_color)
                     );
                 } else {
                     result += v;
@@ -73,14 +77,16 @@ impl Parameter {
             })
     }
 
-    /// Returns the components of the parameter to contruct a [`Tree`].
+    /// Returns the components of the parameter to construct a [`Tree`].
     ///
     /// [`Tree`]: crate::tree::Tree
     pub fn get_tree_components(&self, config: &Config) -> Vec<String> {
         let section_color = *(config
+            .cli
+            .color
             .section_colors
             .get(&self.section)
-            .unwrap_or(&config.default_color));
+            .unwrap_or(&config.cli.color.default_color));
         let mut components = self
             .name
             .split('.')
@@ -93,11 +99,11 @@ impl Parameter {
             .for_each(|(i, component)| {
                 if i != total_components - 1 {
                     *component = component.color(section_color).to_string();
-                } else if config.display_type != DisplayType::Name {
+                } else if config.cli.display_type != DisplayType::Name {
                     *component = format!(
                         "{} {} {}",
                         component,
-                        "=".color(config.default_color),
+                        "=".color(config.cli.color.default_color),
                         self.value.replace('\n', " ").bold()
                     );
                 }
@@ -107,7 +113,7 @@ impl Parameter {
 
     /// Prints the kernel parameter to given output.
     pub fn display_value<Output: Write>(&self, config: &Config, output: &mut Output) -> Result<()> {
-        match config.display_type {
+        match config.cli.display_type {
             DisplayType::Name => {
                 writeln!(output, "{}", self.get_colored_name(config))?;
             }
@@ -123,7 +129,7 @@ impl Parameter {
                         output,
                         "{} {} {}",
                         self.get_colored_name(config),
-                        "=".color(config.default_color),
+                        "=".color(config.cli.color.default_color),
                         value.bold(),
                     )?;
                 }
@@ -185,11 +191,27 @@ impl Parameter {
         let ctl = Ctl::new(&self.name)?;
         let new_value = ctl.set_value_string(new_value)?;
         self.value = new_value;
-        if !config.quiet {
+        if !config.cli.quiet {
             self.display_value(config, output)?;
         }
         Ok(())
     }
+
+    /// Performs a search for given query and returns true if
+    /// the parameter is in the given sub/section.
+    pub fn is_in_section(&self, query: &str) -> bool {
+        let mut subsection = self.section.to_string();
+        let mut components = self.name.split('.').skip(1).peekable();
+        while let Some(component) = components.next() {
+            if query == subsection {
+                return true;
+            }
+            if components.peek().is_some() {
+                subsection = format!("{}.{}", subsection, component)
+            }
+        }
+        false
+    }
 }
 
 #[cfg(test)]
@@ -208,9 +230,16 @@ mod tests {
         };
         assert_eq!(Some("test_param"), parameter.get_absolute_name());
 
-        let mut config = Config::default();
-        config.default_color = Color::White;
-        *(config.section_colors.get_mut(&Section::Kernel).unwrap()) = Color::Yellow;
+        let mut config = Config {
+            ..Default::default()
+        };
+        config.cli.color.default_color = Color::White;
+        *(config
+            .cli
+            .color
+            .section_colors
+            .get_mut(&Section::Kernel)
+            .expect("failed to get color")) = Color::Yellow;
         assert_eq!(parameter.name, parameter.get_colored_name(&config));
 
         assert_eq!(
@@ -230,7 +259,7 @@ mod tests {
         );
 
         output.clear();
-        config.display_type = DisplayType::Name;
+        config.cli.display_type = DisplayType::Name;
         parameter.display_value(&config, &mut output)?;
         assert_eq!(
             "kernel.fictional.test_param\n",
@@ -238,12 +267,12 @@ mod tests {
         );
 
         output.clear();
-        config.display_type = DisplayType::Value;
+        config.cli.display_type = DisplayType::Value;
         parameter.display_value(&config, &mut output)?;
         assert_eq!("1\n", String::from_utf8_lossy(&output));
 
         output.clear();
-        config.display_type = DisplayType::Binary;
+        config.cli.display_type = DisplayType::Binary;
         parameter.display_value(&config, &mut output)?;
         assert_eq!("1", String::from_utf8_lossy(&output));
 
@@ -275,6 +304,19 @@ mod tests {
             .update_value("0", &config, &mut Vec::new())
             .is_err());
 
+        parameter.name = String::from("kernel.fictional.testing.xyz.parameter");
+        assert!(parameter.is_in_section(&parameter.section.to_string()));
+        assert!(parameter.is_in_section("kernel"));
+        assert!(parameter.is_in_section("kernel.fictional"));
+        assert!(parameter.is_in_section("kernel.fictional.testing"));
+        assert!(parameter.is_in_section("kernel.fictional.testing.xyz"));
+        assert!(!parameter.is_in_section("xyz"));
+        assert!(!parameter.is_in_section("test"));
+        assert!(!parameter.is_in_section("ker"));
+        assert!(!parameter.is_in_section("kernel.fi"));
+        assert!(!parameter.is_in_section("kernel.fictional.tes"));
+        assert!(!parameter.is_in_section(&parameter.name));
+
         Ok(())
     }
 }
diff --git a/systeroid-core/src/sysctl/type.rs b/systeroid-core/src/sysctl/type.rs
new file mode 100644
index 0000000..ee70c44
--- /dev/null
+++ b/systeroid-core/src/sysctl/type.rs
@@ -0,0 +1,73 @@
+/// Macro for generating enum type with a Default variant and common implementations.
+macro_rules! gen_type_property {
+    ($name: ident,
+     $($variant: ident,)+
+    ) => {
+        /// Enum containing variants.
+        #[derive(Clone, Copy, Debug, Eq, PartialEq)]
+        pub enum $name {
+            /// Default variant.
+            Default,
+            $(
+                /// Variant.
+                $variant
+            ),+
+        }
+
+        impl<'a> From<&'a str> for $name {
+            fn from(value: &'a str) -> Self {
+                for section in Self::variants() {
+                    if value.to_lowercase() == section.to_string() {
+                        return *section;
+                    }
+                }
+                Self::Default
+            }
+        }
+
+        impl Default for $name {
+            fn default() -> Self {
+                Self::Default
+            }
+        }
+
+        impl ::std::fmt::Display for $name {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                write!(f, "{}", format!("{:?}", self).to_lowercase())
+            }
+        }
+
+        impl $name {
+            /// Returns the variants.
+            pub fn variants() -> &'static [Self] {
+                &[Self::Default, $(Self::$variant),+]
+            }
+        }
+    };
+}
+
+gen_type_property!(DisplayType, Name, Value, Binary,);
+gen_type_property!(OutputType, Tree, Json,);
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_gen_type() {
+        gen_type_property!(TestType, One, Two, Three,);
+        assert_eq!(TestType::Two, TestType::from("two"));
+        assert_eq!(TestType::Two, TestType::from("TwO"));
+        assert_eq!(TestType::Default, TestType::from("tw0"));
+        assert_eq!(TestType::Default, TestType::default());
+        assert_eq!("three", &TestType::Three.to_string());
+        assert_eq!("one", &TestType::One.to_string());
+        assert_eq!(
+            &[
+                TestType::Default,
+                TestType::One,
+                TestType::Two,
+                TestType::Three
+            ],
+            TestType::variants()
+        );
+    }
+}
diff --git a/systeroid-core/src/tree.rs b/systeroid-core/src/tree.rs
index 8982552..cc745c2 100644
--- a/systeroid-core/src/tree.rs
+++ b/systeroid-core/src/tree.rs
@@ -220,12 +220,12 @@ mod tests {
     }
 
     #[test]
-    fn test_tree_output() {
+    fn test_tree_output() -> IoResult<()> {
         let lines = ["a", "a/b/e", "a/b", "a/b/c/d"];
 
         let tree = Tree::from_input(&mut lines.iter(), '/');
         let mut output = Vec::new();
-        tree.print(&mut output, Color::White).unwrap();
+        tree.print(&mut output, Color::White)?;
 
         let expected_output = "\
 a
@@ -235,10 +235,12 @@ a
         └── d\n";
 
         assert_eq!(expected_output, String::from_utf8_lossy(&output));
+
+        Ok(())
     }
 
     #[test]
-    fn test_print_line() {
+    fn test_print_line() -> IoResult<()> {
         let value = String::from("abc\ndef");
 
         let mut output = Vec::new();
@@ -246,8 +248,7 @@ a
             value: value.to_string(),
             childs: Vec::new(),
         }
-        .print_line(&mut output, &[], Color::White)
-        .unwrap();
+        .print_line(&mut output, &[], Color::White)?;
         assert_eq!(b"abc\ndef\n", &*output);
 
         let mut output = Vec::new();
@@ -255,17 +256,17 @@ a
             value: value.to_string(),
             childs: Vec::new(),
         }
-        .print_line(&mut output, &[true, false, true], Color::White)
-        .unwrap();
+        .print_line(&mut output, &[true, false, true], Color::White)?;
         assert_eq!("    │   └── abc\ndef\n".as_bytes(), &*output);
 
         let mut output = Vec::new();
         TreeNode {
-            value: value.to_string(),
+            value,
             childs: Vec::new(),
         }
-        .print_line(&mut output, &[true, false, false], Color::White)
-        .unwrap();
+        .print_line(&mut output, &[true, false, false], Color::White)?;
         assert_eq!("    │   ├── abc\ndef\n".as_bytes(), &*output);
+
+        Ok(())
     }
 }
diff --git a/systeroid-tui/Cargo.toml b/systeroid-tui/Cargo.toml
index e8101e3..17f6ea0 100644
--- a/systeroid-tui/Cargo.toml
+++ b/systeroid-tui/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "systeroid-tui"
-version = "0.1.1" # managed by release.sh
+version = "0.2.1" # managed by release.sh
 description = "A terminal user interface for managing kernel parameters"
 authors = ["Orhun Parmaksız <orhunparmaksiz@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -10,7 +10,7 @@ repository = "https://github.com/orhun/systeroid"
 keywords = ["linux", "kernel", "parameter", "sysctl", "tui"]
 categories = ["command-line-utilities"]
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.57.0"
 
 [features]
 # clipboard support is enabled as default
@@ -20,16 +20,22 @@ clipboard = ["copypasta-ext"]
 [dependencies]
 termion = "1.5.6"
 unicode-width = "0.1.9"
-thiserror = "1.0.30"
+thiserror = "1.0.34"
 getopts = "0.2.21"
 copypasta-ext = { version = "0.3.7", optional = true }
-colorsys = "0.6.5"
+colorsys = "0.6.6"
 
 [dependencies.systeroid-core]
-version = "0.1.1" # managed by release.sh
+version = "0.2.1" # managed by release.sh
 path = "../systeroid-core"
 
 [dependencies.tui]
-version = "0.18.0"
+version = "0.19.0"
 default-features = false
 features = ["termion"]
+
+# metadata for cargo-binstall to get the right artifacts
+[package.metadata.binstall]
+pkg-url = "{ repo }/releases/download/v{ version }/systeroid-{ version }-{ target }.{ archive-format }"
+bin-dir = "systeroid-{ version }/{ bin }{ binary-ext }"
+pkg-fmt = "tgz"
diff --git a/systeroid-tui/src/args.rs b/systeroid-tui/src/args.rs
index 4ca367d..43341ed 100644
--- a/systeroid-tui/src/args.rs
+++ b/systeroid-tui/src/args.rs
@@ -1,7 +1,7 @@
-use crate::style::Colors;
 use getopts::Options;
 use std::env;
 use std::path::PathBuf;
+use systeroid_core::config::CONFIG_ENV;
 use systeroid_core::sysctl::section::Section;
 use systeroid_core::sysctl::KERNEL_DOCS_ENV;
 
@@ -18,6 +18,8 @@ For more details see {bin}(8)."#;
 /// Command-line arguments.
 #[derive(Debug, Default)]
 pub struct Args {
+    /// Location of the configuration file.
+    pub config: Option<PathBuf>,
     /// Refresh rate of the terminal.
     pub tick_rate: u64,
     /// Path of the Linux kernel documentation.
@@ -26,10 +28,14 @@ pub struct Args {
     pub section: Option<Section>,
     /// Query to search on startup.
     pub search_query: Option<String>,
-    /// Background/foreground colors.
-    pub colors: Colors,
+    /// Foreground color.
+    pub fg_color: String,
+    /// Background color.
+    pub bg_color: String,
     /// Do not parse/show Linux kernel documentation.
     pub no_docs: bool,
+    /// Whether if the deprecated variables should be included while listing.
+    pub display_deprecated: bool,
 }
 
 impl Args {
@@ -63,6 +69,17 @@ impl Args {
             "<color>",
         );
         opts.optflag("n", "no-docs", "do not show the kernel documentation");
+        opts.optflag(
+            "",
+            "deprecated",
+            "include deprecated variables while listing",
+        );
+        opts.optopt(
+            "c",
+            "config",
+            "set the path of the configuration file",
+            "<path>",
+        );
         opts.optflag("h", "help", "display this help and exit");
         opts.optflag("V", "version", "output version information and exit");
         opts
@@ -99,13 +116,18 @@ impl Args {
                     .map(PathBuf::from),
                 section: matches.opt_str("s").map(Section::from),
                 search_query: matches.opt_str("q"),
-                colors: Colors::new(
-                    matches.opt_str("bg-color").as_deref().unwrap_or("black"),
-                    matches.opt_str("fg-color").as_deref().unwrap_or("white"),
-                )
-                .map_err(|e| eprintln!("error: `{}`", e))
-                .ok()?,
+                fg_color: matches
+                    .opt_str("fg-color")
+                    .unwrap_or_else(|| String::from("white")),
+                bg_color: matches
+                    .opt_str("bg-color")
+                    .unwrap_or_else(|| String::from("black")),
                 no_docs: matches.opt_present("n"),
+                display_deprecated: matches.opt_present("deprecated"),
+                config: matches
+                    .opt_str("c")
+                    .or_else(|| env::var(CONFIG_ENV).ok())
+                    .map(PathBuf::from),
             })
         }
     }
@@ -136,7 +158,7 @@ mod tests {
             String::from("-q"),
             String::from("test"),
         ])
-        .unwrap();
+        .expect("failed to parse arguments");
 
         assert_eq!(1000, args.tick_rate);
         assert_eq!(Some(PathBuf::from("/docs")), args.kernel_docs);
diff --git a/systeroid-tui/src/command.rs b/systeroid-tui/src/command.rs
index 8280a70..28e1b3e 100644
--- a/systeroid-tui/src/command.rs
+++ b/systeroid-tui/src/command.rs
@@ -3,7 +3,7 @@ use std::str::FromStr;
 use termion::event::Key;
 
 /// Possible application commands.
-#[derive(Debug, PartialEq)]
+#[derive(Debug, PartialEq, Eq)]
 pub enum Command {
     /// Show help.
     Help,
@@ -47,17 +47,14 @@ impl FromStr for Command {
             "exit" | "quit" | "q" | "q!" => Ok(Command::Exit),
             _ => {
                 if s.starts_with("set") {
-                    let values: Vec<&str> = s
-                        .trim_start_matches("set")
-                        .trim()
-                        .split_whitespace()
-                        .collect();
+                    let values: Vec<&str> =
+                        s.trim_start_matches("set").split_whitespace().collect();
                     Ok(Command::Set(
                         values.first().ok_or(())?.to_string(),
                         values[1..].join(" "),
                     ))
                 } else if s.starts_with("scroll") {
-                    let mut values = s.trim_start_matches("scroll").trim().split_whitespace();
+                    let mut values = s.trim_start_matches("scroll").split_whitespace();
                     Ok(Command::Scroll(
                         ScrollArea::try_from(values.next().ok_or(())?)?,
                         Direction::try_from(values.next().ok_or(())?)?,
@@ -157,7 +154,7 @@ mod tests {
                 "scroll list bottom 1",
             ),
         ] {
-            assert_eq!(command, Command::from_str(value).unwrap());
+            assert_eq!(Ok(command), Command::from_str(value));
         }
         assert!(Command::from_str("---").is_err());
         assert_command_parser! {
diff --git a/systeroid-tui/src/event.rs b/systeroid-tui/src/event.rs
index b3fec84..ff71984 100644
--- a/systeroid-tui/src/event.rs
+++ b/systeroid-tui/src/event.rs
@@ -58,13 +58,14 @@ impl EventHandler {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::error::Result;
     use std::char;
     use std::time::Instant;
 
     const TICK_RATE_MS: u64 = 100;
 
     #[test]
-    fn test_event() {
+    fn test_event() -> Result<()> {
         let start_time = Instant::now();
         let event_handler = EventHandler::new(TICK_RATE_MS);
         let mut tick_count = 0;
@@ -73,9 +74,9 @@ mod tests {
             thread::spawn(move || {
                 let key = Key::Char(char::from_digit(i, 10).unwrap_or('9'));
                 let event = Event::KeyPress(key);
-                sender.send(event).unwrap();
+                sender.send(event).expect("failed to send event");
             });
-            match event_handler.next().unwrap() {
+            match event_handler.next()? {
                 Event::KeyPress(key) => {
                     if key == Key::Char('9') {
                         break;
@@ -88,5 +89,6 @@ mod tests {
             }
         }
         assert!(start_time.elapsed() > Duration::from_millis(tick_count * TICK_RATE_MS));
+        Ok(())
     }
 }
diff --git a/systeroid-tui/src/lib.rs b/systeroid-tui/src/lib.rs
index 5b2a98a..3ea6aa4 100644
--- a/systeroid-tui/src/lib.rs
+++ b/systeroid-tui/src/lib.rs
@@ -26,6 +26,7 @@ use crate::args::Args;
 use crate::command::Command;
 use crate::error::Result;
 use crate::event::{Event, EventHandler};
+use crate::style::Colors;
 use systeroid_core::cache::Cache;
 use systeroid_core::config::Config;
 use systeroid_core::sysctl::controller::Sysctl;
@@ -34,14 +35,25 @@ use tui::terminal::Terminal;
 
 /// Runs `systeroid-tui`.
 pub fn run<B: Backend>(args: Args, backend: B) -> Result<()> {
-    let mut sysctl = Sysctl::init(Config::default())?;
-    if !args.no_docs {
-        sysctl.update_docs_from_cache(args.kernel_docs.as_ref(), &Cache::init()?)?;
+    let mut config = Config {
+        display_deprecated: args.display_deprecated,
+        kernel_docs: args.kernel_docs,
+        ..Default::default()
+    };
+    config.tui.tick_rate = args.tick_rate;
+    config.tui.no_docs = args.no_docs;
+    config.tui.color.fg_color = args.fg_color;
+    config.tui.color.bg_color = args.bg_color;
+    config.parse(args.config)?;
+    let colors = Colors::new(&config.tui.color.bg_color, &config.tui.color.fg_color)?;
+    let mut sysctl = Sysctl::init(config)?;
+    if !sysctl.config.tui.no_docs {
+        sysctl.update_docs_from_cache(&Cache::init()?)?;
     }
     let mut terminal = Terminal::new(backend)?;
     terminal.hide_cursor()?;
     terminal.clear()?;
-    let event_handler = EventHandler::new(args.tick_rate);
+    let event_handler = EventHandler::new(sysctl.config.tui.tick_rate);
     let mut app = App::new(&mut sysctl);
     if let Some(section) = args.section {
         app.section_list.state.select(Some(
@@ -59,7 +71,7 @@ pub fn run<B: Backend>(args: Args, backend: B) -> Result<()> {
         app.input = None;
     }
     while app.running {
-        terminal.draw(|frame| ui::render(frame, &mut app, &args.colors))?;
+        terminal.draw(|frame| ui::render(frame, &mut app, &colors))?;
         match event_handler.next()? {
             Event::KeyPress(key) => {
                 let command = Command::parse(key, app.is_input_mode());
@@ -87,6 +99,8 @@ mod tests {
     fn test_systeroid_tui() -> Result<()> {
         let args = Args {
             tick_rate: 1000,
+            fg_color: String::from("white"),
+            bg_color: String::from("black"),
             ..Args::default()
         };
         let backend = TestBackend::new(40, 10);
diff --git a/systeroid-tui/src/options.rs b/systeroid-tui/src/options.rs
index 4377dc7..ad8d5d5 100644
--- a/systeroid-tui/src/options.rs
+++ b/systeroid-tui/src/options.rs
@@ -5,7 +5,7 @@ macro_rules! generate_option {
      $($variant: ident => $str_repr: expr,)+
     ) => {
         /// Available options.
-        #[derive(Clone, Copy, Debug, PartialEq)]
+        #[derive(Clone, Copy, Debug, PartialEq, Eq)]
         pub enum $name {
             $(
                 /// Option.
diff --git a/systeroid-tui/src/style.rs b/systeroid-tui/src/style.rs
index 99f7c14..9ad07c4 100644
--- a/systeroid-tui/src/style.rs
+++ b/systeroid-tui/src/style.rs
@@ -5,7 +5,7 @@ use std::str::FromStr;
 use tui::style::{Color as TuiColor, Style};
 
 /// Color configuration.
-#[derive(Clone, Copy, Debug, Default, PartialEq)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
 pub struct Colors {
     /// Background color.
     bg: Color,
@@ -39,7 +39,7 @@ impl Colors {
 }
 
 /// Wrapper for widget colors.
-#[derive(Clone, Copy, Debug, PartialEq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct Color {
     /// Inner type.
     inner: TuiColor,
@@ -76,13 +76,13 @@ impl FromStr for Color {
                 "magenta" => TuiColor::Magenta,
                 "cyan" => TuiColor::Cyan,
                 "gray" => TuiColor::Gray,
-                "darkgray" => TuiColor::DarkGray,
-                "lightred" => TuiColor::LightRed,
-                "lightgreen" => TuiColor::LightGreen,
-                "lightyellow" => TuiColor::LightYellow,
-                "lightblue" => TuiColor::LightBlue,
-                "lightmagenta" => TuiColor::LightMagenta,
-                "lightcyan" => TuiColor::LightCyan,
+                "darkgray" | "dark gray" => TuiColor::DarkGray,
+                "lightred" | "light red" => TuiColor::LightRed,
+                "lightgreen" | "light green" => TuiColor::LightGreen,
+                "lightyellow" | "light yellow" => TuiColor::LightYellow,
+                "lightblue" | "light blue" => TuiColor::LightBlue,
+                "lightmagenta" | "light magenta" => TuiColor::LightMagenta,
+                "lightcyan" | "light cyan" => TuiColor::LightCyan,
                 "white" => TuiColor::White,
                 _ => {
                     let rgb = Rgb::from_hex_str(&format!("#{}", s))?;
@@ -102,6 +102,8 @@ mod tests {
         assert_eq!(TuiColor::Gray, Color::from_str("gray")?.get());
         assert_eq!(TuiColor::Black, Color::from_str("black")?.get());
         assert_eq!(TuiColor::Green, Color::from_str("green")?.get());
+        assert_eq!(TuiColor::LightRed, Color::from_str("light red")?.get());
+        assert_eq!(TuiColor::LightBlue, Color::from_str("lightblue")?.get());
         assert_eq!(
             TuiColor::Rgb(152, 157, 69),
             Color::from_str("989D45")?.get()
diff --git a/systeroid/Cargo.toml b/systeroid/Cargo.toml
index fd1a017..dba98e6 100644
--- a/systeroid/Cargo.toml
+++ b/systeroid/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "systeroid"
-version = "0.1.1" # managed by release.sh
+version = "0.2.1" # managed by release.sh
 description = "A more powerful alternative to sysctl"
 authors = ["Orhun Parmaksız <orhunparmaksiz@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -21,5 +21,11 @@ live-tests = []
 getopts = "0.2.21"
 
 [dependencies.systeroid-core]
-version = "0.1.1" # managed by release.sh
+version = "0.2.1" # managed by release.sh
 path = "../systeroid-core"
+
+# metadata for cargo-binstall to get the right artifacts
+[package.metadata.binstall]
+pkg-url = "{ repo }/releases/download/v{ version }/{ name }-{ version }-{ target }.{ archive-format }"
+bin-dir = "{ name }-{ version }/{ bin }{ binary-ext }"
+pkg-fmt = "tgz"
diff --git a/systeroid/src/app.rs b/systeroid/src/app.rs
index cd2ca1f..7d6475a 100644
--- a/systeroid/src/app.rs
+++ b/systeroid/src/app.rs
@@ -1,4 +1,3 @@
-use crate::output::OutputType;
 use std::env;
 use std::io::{self, BufRead, Write};
 use std::path::PathBuf;
@@ -9,6 +8,7 @@ use systeroid_core::parseit::reader;
 use systeroid_core::parseit::regex::Regex;
 use systeroid_core::sysctl::controller::Sysctl;
 use systeroid_core::sysctl::parameter::Parameter;
+use systeroid_core::sysctl::r#type::OutputType;
 use systeroid_core::sysctl::{DEPRECATED_PARAMS, SYSTEM_PRELOAD};
 use systeroid_core::tree::{Tree, TreeNode};
 
@@ -19,18 +19,12 @@ pub struct App<'a, Output: Write> {
     sysctl: &'a mut Sysctl,
     /// Standard output.
     output: &'a mut Output,
-    /// Output type.
-    output_type: OutputType,
 }
 
 impl<'a, Output: Write> App<'a, Output> {
     /// Constructs a new instance.
-    pub fn new(sysctl: &'a mut Sysctl, output: &'a mut Output, output_type: OutputType) -> Self {
-        Self {
-            sysctl,
-            output,
-            output_type,
-        }
+    pub fn new(sysctl: &'a mut Sysctl, output: &'a mut Output) -> Self {
+        Self { sysctl, output }
     }
 
     /// Prints the given parameters to stdout.
@@ -38,7 +32,7 @@ impl<'a, Output: Write> App<'a, Output> {
     where
         I: Iterator<Item = &'b Parameter>,
     {
-        match self.output_type {
+        match self.sysctl.config.cli.output_type {
             OutputType::Default => {
                 parameters.try_for_each(|parameter| {
                     parameter.display_value(&self.sysctl.config, self.output)
@@ -54,7 +48,8 @@ impl<'a, Output: Write> App<'a, Output> {
                             .map(|v| v.as_ref()),
                     );
                 });
-                Tree::new(root_node.childs).print(self.output, self.sysctl.config.default_color)?;
+                Tree::new(root_node.childs)
+                    .print(self.output, self.sysctl.config.cli.color.default_color)?;
             }
             OutputType::Json => {
                 Parameter::display_bulk_json(parameters.collect(), self.output)?;
@@ -64,22 +59,12 @@ impl<'a, Output: Write> App<'a, Output> {
     }
 
     /// Displays all of the available kernel parameters.
-    pub fn display_parameters(
-        &mut self,
-        pattern: Option<Regex>,
-        display_deprecated: bool,
-        explain: bool,
-    ) -> Result<()> {
+    pub fn display_parameters(&mut self, pattern: Option<Regex>, explain: bool) -> Result<()> {
         let parameters = self.sysctl.parameters.clone();
         let mut parameters = parameters.iter().filter(|parameter| {
             if let Some(pattern) = &pattern {
                 return pattern.is_match(&parameter.name);
             }
-            if !display_deprecated {
-                if let Some(param_name) = parameter.get_absolute_name() {
-                    return !DEPRECATED_PARAMS.contains(&param_name);
-                }
-            }
             true
         });
         if explain {
@@ -91,7 +76,7 @@ impl<'a, Output: Write> App<'a, Output> {
 
     /// Displays the documentation of a parameter.
     pub fn display_documentation(&mut self, param_name: &str) -> Result<()> {
-        let no_pager = self.sysctl.config.no_pager;
+        let no_pager = self.sysctl.config.cli.no_pager;
         for parameter in self.sysctl.get_parameters(param_name) {
             let mut fallback_to_default = false;
             if no_pager {
@@ -182,7 +167,9 @@ impl<'a, Output: Write> App<'a, Output> {
     /// Processes the parameters in the given file.
     pub fn preload_from_file(&mut self, path: PathBuf) -> Result<()> {
         if path == PathBuf::from("-") {
-            for line in io::stdin().lock().lines() {
+            let stdin = io::stdin();
+            let lines = stdin.lock().lines();
+            for line in lines {
                 if let Err(e) = self.process_parameter(line?, true, false) {
                     println!("{}: {}", env!("CARGO_PKG_NAME"), e);
                 }
@@ -239,22 +226,21 @@ mod tests {
     #[test]
     fn test_app() -> Result<()> {
         let mut output = Vec::new();
-        let mut sysctl = Sysctl::init(Config {
-            no_pager: true,
-            ..Config::default()
-        })?;
-        sysctl.update_docs_from_cache(None, &Cache::init()?)?;
+        let mut config = Config::default();
+        config.cli.no_pager = true;
+        let mut sysctl = Sysctl::init(config)?;
+        sysctl.update_docs_from_cache(&Cache::init()?)?;
 
-        let mut app = App::new(&mut sysctl, &mut output, OutputType::Default);
+        let mut app = App::new(&mut sysctl, &mut output);
 
-        app.display_parameters(Regex::new("kernel|vm").ok(), false, false)?;
+        app.display_parameters(Regex::new("kernel|vm").ok(), false)?;
         let result = String::from_utf8_lossy(app.output);
         assert!(result.contains("vm.zone_reclaim_mode ="));
         assert!(result.contains("kernel.version ="));
         app.output.clear();
 
-        app.output_type = OutputType::Tree;
-        app.display_parameters(None, true, false)?;
+        app.sysctl.config.cli.output_type = OutputType::Tree;
+        app.display_parameters(None, false)?;
         assert!(String::from_utf8_lossy(app.output).contains("─ osrelease ="));
         app.output.clear();
 
@@ -263,7 +249,7 @@ mod tests {
         app.output.clear();
 
         let param_name = String::from("kernel.version");
-        app.output_type = OutputType::Default;
+        app.sysctl.config.cli.output_type = OutputType::Default;
         app.process_parameter(param_name.clone(), true, false)?;
         let result = String::from_utf8_lossy(app.output);
         assert_eq!(1, result.lines().count());
@@ -271,7 +257,7 @@ mod tests {
         app.output.clear();
 
         let param_name = String::from("kernel.version");
-        app.output_type = OutputType::Json;
+        app.sysctl.config.cli.output_type = OutputType::Json;
         app.process_parameter(param_name.clone(), true, false)?;
         let result = String::from_utf8_lossy(app.output);
         assert!(result.contains("\"section\":\"kernel\""));
diff --git a/systeroid/src/args.rs b/systeroid/src/args.rs
index 0cc8819..57ddccb 100644
--- a/systeroid/src/args.rs
+++ b/systeroid/src/args.rs
@@ -1,9 +1,10 @@
-use crate::output::OutputType;
 use getopts::Options;
 use std::env;
 use std::path::PathBuf;
+use systeroid_core::config::CONFIG_ENV;
 use systeroid_core::parseit::regex::Regex;
-use systeroid_core::sysctl::display::DisplayType;
+use systeroid_core::sysctl::r#type::DisplayType;
+use systeroid_core::sysctl::r#type::OutputType;
 use systeroid_core::sysctl::{DEFAULT_PRELOAD, KERNEL_DOCS_ENV};
 
 /// Help message for the arguments.
@@ -19,6 +20,8 @@ For more details see {bin}(8)."#;
 /// Command-line arguments.
 #[derive(Debug, Default)]
 pub struct Args {
+    /// Location of the configuration file.
+    pub config: Option<PathBuf>,
     /// Whether if the verbose logging is enabled.
     pub verbose: bool,
     /// Whether if the quiet mode is enabled.
@@ -97,6 +100,12 @@ impl Args {
         opts.optflag("P", "no-pager", "do not pipe output into a pager");
         opts.optflag("v", "verbose", "enable verbose logging");
         opts.optflag("", "tui", "show terminal user interface");
+        opts.optopt(
+            "c",
+            "config",
+            "set the path of the configuration file",
+            "<path>",
+        );
         opts.optflag("h", "help", "display this help and exit (-d)");
         opts.optflag("V", "version", "output version information and exit");
         opts
@@ -195,6 +204,10 @@ impl Args {
                 explain: matches.opt_present("E"),
                 output_type,
                 show_tui: matches.opt_present("tui"),
+                config: matches
+                    .opt_str("c")
+                    .or_else(|| env::var(CONFIG_ENV).ok())
+                    .map(PathBuf::from),
                 values: matches.free,
             })
         }
@@ -222,20 +235,20 @@ mod tests {
             String::from("-A"),
             String::from("-T"),
         ])
-        .unwrap();
+        .expect("failed to parse arguments");
         assert!(args.verbose);
         assert!(args.write);
         assert_eq!(OutputType::Tree, args.output_type);
 
         assert!(!Args::parse(vec![String::new(), String::from("-p")])
-            .unwrap()
+            .expect("failed to parse arguments")
             .values
             .is_empty());
 
         assert_eq!(
             DisplayType::Binary,
             Args::parse(vec![String::new(), String::from("-A"), String::from("-b")])
-                .unwrap()
+                .expect("failed to parse arguments")
                 .display_type
         );
     }
diff --git a/systeroid/src/lib.rs b/systeroid/src/lib.rs
index 2790e51..fd6f220 100644
--- a/systeroid/src/lib.rs
+++ b/systeroid/src/lib.rs
@@ -6,8 +6,6 @@
 pub mod app;
 /// Command-line argument parser.
 pub mod args;
-/// Application output types.
-pub mod output;
 
 use crate::app::App;
 use crate::args::Args;
@@ -20,24 +18,28 @@ use systeroid_core::sysctl::controller::Sysctl;
 
 /// Runs `systeroid`.
 pub fn run<Output: Write>(args: Args, output: &mut Output) -> Result<()> {
-    let config = Config {
-        verbose: args.verbose,
-        ignore_errors: args.ignore_errors,
-        quiet: args.quiet,
-        no_pager: args.no_pager,
-        display_type: args.display_type,
+    let mut config = Config {
+        display_deprecated: args.display_deprecated,
+        kernel_docs: args.kernel_docs,
         ..Default::default()
     };
+    config.cli.verbose = args.verbose;
+    config.cli.ignore_errors = args.ignore_errors;
+    config.cli.quiet = args.quiet;
+    config.cli.no_pager = args.no_pager;
+    config.cli.display_type = args.display_type;
+    config.cli.output_type = args.output_type;
+    config.parse(args.config)?;
     let mut sysctl = Sysctl::init(config)?;
     if args.explain {
-        sysctl.update_docs_from_cache(args.kernel_docs.as_ref(), &Cache::init()?)?;
+        sysctl.update_docs_from_cache(&Cache::init()?)?;
     }
-    let mut app = App::new(&mut sysctl, output, args.output_type);
+    let mut app = App::new(&mut sysctl, output);
 
     if args.preload_system_files {
         app.preload_from_system()?;
     } else if args.values.is_empty() {
-        app.display_parameters(args.pattern, args.display_deprecated, args.explain)?;
+        app.display_parameters(args.pattern, args.explain)?;
     } else if args.explain {
         for param in args.values {
             app.display_documentation(&param)?;
diff --git a/systeroid/src/main.rs b/systeroid/src/main.rs
index 49cd4c7..4623c52 100644
--- a/systeroid/src/main.rs
+++ b/systeroid/src/main.rs
@@ -8,6 +8,9 @@ fn main() {
         if args.show_tui {
             let bin = format!("{}-tui", env!("CARGO_PKG_NAME"));
             let mut command = Command::new(&bin);
+            if let Some(config) = args.config {
+                command.arg("--config").arg(config);
+            }
             if let Some(kernel_docs) = args.kernel_docs {
                 command.arg("--docs").arg(kernel_docs);
             }
diff --git a/systeroid/src/output.rs b/systeroid/src/output.rs
deleted file mode 100644
index 992b0e5..0000000
--- a/systeroid/src/output.rs
+++ /dev/null
@@ -1,18 +0,0 @@
-/// Possible output types for the [`App`].
-///
-/// [`App`]: crate::app::App
-#[derive(Clone, Debug, Eq, PartialEq)]
-pub enum OutputType {
-    /// Print the output as is.
-    Default,
-    /// Print the output in a tree-like format.
-    Tree,
-    /// Print the output in JSON format.
-    Json,
-}
-
-impl Default for OutputType {
-    fn default() -> Self {
-        Self::Default
-    }
-}
diff --git a/systeroid/tests/live_test.rs b/systeroid/tests/live_test.rs
index 301bcca..c84d9f7 100644
--- a/systeroid/tests/live_test.rs
+++ b/systeroid/tests/live_test.rs
@@ -1,7 +1,6 @@
-use {
-    systeroid::args::Args, systeroid_core::error::Result,
-    systeroid_core::sysctl::display::DisplayType,
-};
+use systeroid::args::Args;
+use systeroid_core::error::Result;
+use systeroid_core::sysctl::r#type::DisplayType;
 
 #[cfg_attr(not(feature = "live-tests"), ignore)]
 #[test]