rm is the 'remove' command. Given sufficient rights in a directory, a user may remove one or more files.
From the Gnu-rm helppage:
Usage: rm [OPTION]... FILE... Remove (unlink) the FILE(s). -f, --force ignore nonexistent files, never prompt -i prompt before every removal -I prompt once before removing more than three files, or when removing recursively. Less intrusive than -i, while still giving protection against most mistakes --interactive[=WHEN] prompt according to WHEN: never, once (-I), or always (-i). Without WHEN, prompt always --one-file-system when removing a hierarchy recursively, skip any directory that is on a file system different from that of the corresponding command line argument --no-preserve-root do not treat `/' specially --preserve-root do not remove `/' (default) -r, -R, --recursive remove directories and their contents recursively -v, --verbose explain what is being done --help display this help and exit --version output version information and exit By default, rm does not remove directories. Use the --recursive (-r or -R) option to remove each listed directory, too, along with all of its contents. To remove a file whose name starts with a `-', for example `-foo', use one of these commands: rm -- -foo rm ./-foo Note that if you use rm to remove a file, it is usually possible to recover the contents of that file. If you want more assurance that the contents are truly unrecoverable, consider using shred. Report rm bugs to firstname.lastname@example.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/>