diff --git a/technology/applications/OpenSSL.md b/technology/applications/OpenSSL.md
index 52d1054..5e00942 100644
--- a/technology/applications/OpenSSL.md
+++ b/technology/applications/OpenSSL.md
@@ -27,7 +27,14 @@ openssl [command] [options]
 #### Generate a certificate
 Usage: `openssl req -x509 -key private_key.pem -out certificate.pem -days 365`
 
-#refactor -> infos on signed certificates with CAs
+#### Generate a signed certificate
+```shell
+# Create Certificate Request
+openssl req -new -key entity.key -out entity.csr
+
+# Sign with CA
+openssl x509 -req -in entity.csr -CA ca.crt -CAkey ca.key -out entity.crt -CAcreateserial
+```
 
 #### Show information about a certificate
 Usage: `openssl x509 -in certificate.pem -text -noout`
diff --git a/technology/applications/SSH.md b/technology/applications/SSH.md
index efed1ac..08a08bc 100644
--- a/technology/applications/SSH.md
+++ b/technology/applications/SSH.md
@@ -53,6 +53,25 @@ Use a jump host:
 ssh -J jump_server remote
 ```
 
+Forward port to remote using [systemd](../linux/Systemd.md) service:
+```ini
+[Unit]
+Description=SSH Port Forwarding
+After=network.target
+After=systemd-resolved.service
+
+[Service]
+User=<USER>
+ExecStart=/usr/bin/ssh -i <KEY> -o ExitOnForwardFailure=yes -N -R 0.0.0.0:<PORT>:127.0.0.1:<PORT> user@example.com
+Restart=always
+StartLimitInterval=0
+StartLimitBurst=0
+RestartSec=30s
+
+[Install]
+WantedBy=multi-user.target
+```
+
 ### Configuration
 Client can be configured by the file `~/.ssh/config`
 ```
diff --git a/technology/applications/cli/jq.md b/technology/applications/cli/jq.md
index 71fb320..f736c5d 100644
--- a/technology/applications/cli/jq.md
+++ b/technology/applications/cli/jq.md
@@ -9,6 +9,9 @@ jq is a lightweight and flexible command-line [JSON](../../files/JSON.md) proces
 ## Usage
 ```shell
 cat data.json | jq [FILTER]
+
+# Raw Data
+cat data.json | jq -r [FILTER]
 ```
 
 ## Filters
diff --git a/technology/applications/cli/skim.md b/technology/applications/cli/skim.md
deleted file mode 100644
index e37dffc..0000000
--- a/technology/applications/cli/skim.md
+++ /dev/null
@@ -1,15 +0,0 @@
----
-obj: application
-os: linux
-repo: https://github.com/lotabout/skim
----
-# skim
-[Repo](https://github.com/lotabout/skim)
-Skim is a fuzzy finder.
-#refactor 
-
-## Usage
-Flags:
-```shell
--m, --multi          Enable Multiple Selection
-```
\ No newline at end of file
diff --git a/technology/applications/development/xh.md b/technology/applications/development/xh.md
deleted file mode 100644
index 36fbc13..0000000
--- a/technology/applications/development/xh.md
+++ /dev/null
@@ -1,34 +0,0 @@
----
-obj: application
-os:
-  - linux
-repo: https://github.com/ducaale/xh
----
-# xh
-#refactor 
-[Repo](https://github.com/ducaale/xh)
-xh is a friendly and fast tool for sending [HTTP](../../internet/HTTP.md) requests. It reimplements as much as possible of [HTTPie](HTTPie.md)'s excellent design, with a focus on improved performance.
-
-## Examples
-```
-# Send a GET request
-xh httpbin.org/json
-
-# Send a POST request with body {"name": "ahmed", "age": 24}
-xh httpbin.org/post name=ahmed age:=24
-
-# Send a GET request with querystring id=5&sort=true
-xh get httpbin.org/json id==5 sort==true
-
-# Send a GET request and include a header named x-api-key with value 12345
-xh get httpbin.org/json x-api-key:12345
-
-# Send a PUT request and pipe the result to less
-xh put httpbin.org/put id:=49 age:=25 | less
-
-# Download and save to res.json
-xh -d httpbin.org/json -o res.json
-
-# Make a request with a custom user agent
-xh httpbin.org/get user-agent:foobar
-```
\ No newline at end of file
diff --git a/technology/programming/languages/Python.md b/technology/programming/languages/Python.md
index cff27ff..3832a6e 100644
--- a/technology/programming/languages/Python.md
+++ b/technology/programming/languages/Python.md
@@ -1,5 +1,5 @@
 ---
-website: https://www.python.org/
+website: https://www.python.org
 obj: application
 ---