rm可以用来删除文件和文件夹。 

rm --help

Usage: rm [OPTION]... FILE...

Remove (unlink) the FILE(s).





  -f, --force           ignore nonexistent files, never prompt（提示）

  -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（递归地）

  -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 bug-coreutils@gnu.org

GNU coreutils home page: <http://www.gnu.org/software/coreutils/>

General help using GNU software: <http://www.gnu.org/gethelp/>

For complete documentation, run: info coreutils 'rm invocation'>