  the gnu core utilities or coreutils is a package of gnu software containing many of the basic tools, such as cat, ls, and rm, needed for unix-like operating systems. it is a combination of a number of earlier packages, including textutils, shellutils, and fileutils, along with some other miscellaneous utilities. ==gnu coreutils capabilities== the gnu core utilities support long options as parameters to the commands, as well as (unless the posixly_correct environment variable is set) the relaxed convention allowing options even after the regular arguments. note that this environment variable enables a different functionality in bsd. ==programs included in coreutils== {| class="wikitable" |+ the list spans the programs from coreutils 8.23. |- ! colspan="2" | file utilities |- | chcon || changes file security context (selinux) |- | chgrp || changes file group ownership |- | chown || changes file ownership |- | chmod || changes the permissions of a file or directory |- | cp || copies a file or directory |- | dd || copies and converts a file |- | df || shows disk free space on file systems |- | dir || is exactly like "ls -c -b". (files are by default listed in columns and sorted vertically.) |- | dircolors || set up color for ls |- | install || copies files and set attributes |- | ln || creates a link to a file |- | ls || lists the files in a directory |- | mkdir || creates a directory |- | mkfifo || makes named pipes (fifos) |- | mknod || makes block or character special files |- | mktemp || creates a temporary file or directory |- | mv || moves files or rename files |- | realpath || returns the resolved absolute or relative path for a file |- | rm || removes (deletes) files |- | rmdir || removes empty directories |- | shred || overwrites a file to hide its contents, and optionally deletes it |- | sync || flushes file system buffers |- | touch || changes file timestamps |- | truncate || shrink or extend the size of a file to the specified size |- | vdir || is exactly like "ls -l -b". (files are by default listed in long format.) |- ! colspan="2" | text utilities |- | [[base
Free_software_programmed_in_C Free_system_software GNU_Project_software Unix_software