shell 命令之rm

1. rm

rm --help
Usage: rm [OPTION]... [FILE]...
Remove (unlink) the FILE(s).

  -f, --force           ignore nonexistent files and arguments, 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[=all]  do not remove '/' (default);
                              with 'all', reject any command line argument
                              on a separate device from its parent
  -r, -R, --recursive   remove directories and their contents recursively
  -d, --dir             remove empty directories
  -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 might be possible to recover
some of its contents, given sufficient expertise and/or time.  For greater
assurance that the contents are truly unrecoverable, consider using shred.

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Full documentation at: <https://www.gnu.org/software/coreutils/rm>
or available locally via: info '(coreutils) rm invocation'

常用举例

1. 直接删除，并且返回提示确认删除，可以防止误删。

[test]# rm aaa.txt
rm: remove regular empty file 'aaa.txt'? y
[test]#

2. 在脚本中使用时候，忽略提示，不用进行交互直接删除，使用--force(-f)

[test]# touch aaa.txt
[test]# rm -f aaa.txt
[test]# ls

3. 递归删除文件夹及文件夹下的所有文件

[ aa]# ls
aaa.txt  bbb.txt  ccc.txt  ddd.txt
[test]# rm -rf aa/
[test]# ls