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10
technology/applications/cli/system/Core Utils.md
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@ -3,7 +3,9 @@ obj: application
website: https://www.gnu.org/software/coreutils/
repo: https://git.savannah.gnu.org/git/coreutils.git
wiki: https://en.wikipedia.org/wiki/GNU_Core_Utilities
rev: 2024-08-26
---
# GNU Core Utils
The GNU Core Utilities or coreutils is a package of GNU software containing implementations for many of the basic tools, such as cat, ls, and rm, which are used on Unix-like operating systems.
@ -49,7 +51,7 @@ Usage: `chmod [OPTION]... OCTAL-MODE FILE...`
| `-f, --silent, --quiet` | suppress most error messages |
| `-v, --verbose` | output a diagnostic for every file processed |
| `--reference=RFILE` | use RFILE's mode instead of specifying MODE values. RFILE is always dereferenced if a symbolic link. |
| `-R, --recursive` | change files and directories recursively | |
| `-R, --recursive` | change files and directories recursively |
## chown
change file owner and group
@ -123,10 +125,12 @@ Usage: `date [OPTION]... [+FORMAT]`
### Options
| Option | Description |
| ---------------------- | ------------------------------------------ |
| ------------------------ | --------------------------------------------- |
| `-d, --date=STRING` | display time described by STRING |
| `-r, --reference=FILE` | display the last modification time of FILE |
| `-s, --set=STRING` | set time described by STRING |
| `-u, --utc, --universal` | print or set Coordinated Universal Time (UTC) |
| `--iso` | print ISO date (`YYYY-MM-DD`) |
## dd
convert and copy a file
@ -283,7 +287,7 @@ Usage: `ls [OPTION]... [FILE]...`
### Options
| Option | Description |
| ---------------------- | --------------------------------------------------- |
| ---------------------- | -------------------------------------------------- |
| `-a, --all` | do not ignore entries starting with . |
| `-h, --human-readable` | with `-l` print sizes like 1K 234M 2G etc |
| `-I, --ignore=PATTERN` | do not list implied entries matching shell PATTERN |