리눅스 command

  다른 뜻에 대해서는 Command 패턴 문서를 참조하십시오.

  다른 뜻에 대해서는 명령어 문서를 참조하십시오.

1 개요

리눅스 command

• 명령어를 실행하는 명령어
• Bash 빌트인 명령어 중 하나

root@zetawiki:~# type command
command is a shell builtin

root@zetawiki:~# command --help
command: command [-pVv] command [arg ...]
    Execute a simple command or display information about commands.

    Runs COMMAND with ARGS suppressing  shell function lookup, or display
    information about the specified COMMANDs.  Can be used to invoke commands
    on disk when a function with the same name exists.

    Options:
      -p    use a default value for PATH that is guaranteed to find all of
            the standard utilities
      -v    print a description of COMMAND similar to the `type' builtin
      -V    print a more verbose description of each COMMAND

    Exit Status:
    Returns exit status of COMMAND, or failure if COMMAND is not found.

root@zetawiki:~# ls /var
backups  cache  lib  local  lock  log  mail  opt  run  spool  tmp  www
root@zetawiki:~# command ls /var
backups  cache  lib  local  lock  log  mail  opt  run  spool  tmp  www
root@zetawiki:~# command -p ls /var
backups  cache  lib  local  lock  log  mail  opt  run  spool  tmp  www

2 -v

• command -v는 대략 which, alias와 유사하다.

root@zetawiki:~# command -v sed
/bin/sed
root@zetawiki:~# which sed
/bin/sed

root@zetawiki:~# command -v ls /var
alias ls='ls $LS_OPTIONS'
root@zetawiki:~# command -v ls
alias ls='ls $LS_OPTIONS'
root@zetawiki:~# alias ls
alias ls='ls $LS_OPTIONS'

3 -V

• command -V는 대략 type과 유사하다.

root@zetawiki:~# command -V sed
sed is hashed (/bin/sed)
root@zetawiki:~# type sed
sed is hashed (/bin/sed)

root@zetawiki:~# command -V ls /var
ls is aliased to `ls $LS_OPTIONS'
-bash: command: /var: not found
root@zetawiki:~# command -V ls
ls is aliased to `ls $LS_OPTIONS'
root@zetawiki:~# alias ls
alias ls='ls $LS_OPTIONS'
root@zetawiki:~# type ls
ls is aliased to `ls --color=auto'

4 기타

root@zetawiki:~# command l /var
-bash: l: command not found
root@zetawiki:~# command l
-bash: l: command not found
root@zetawiki:~# alias l
alias l='ls $LS_OPTIONS -alA'
root@zetawiki:~# type l
l is aliased to `ls $LS_OPTIONS -alA'
root@zetawiki:~# l /var
total 40
drwxr-xr-x  2 root root  4096 Mar 20  2021 backups
drwxr-xr-x  6 root root  4096 Oct  9 02:24 cache
drwxr-xr-x 21 root root  4096 Jan 29 18:15 lib
drwxrwsr-x  2 root staff 4096 Mar 20  2021 local
lrwxrwxrwx  1 root root     9 Apr  6  2021 lock -> /run/lock
drwxr-xr-x  5 root root  4096 Jan 29 18:15 log
drwxrwsr-x  2 root mail  4096 Apr  6  2021 mail
drwxr-xr-x  2 root root  4096 Apr  6  2021 opt
lrwxrwxrwx  1 root root     4 Apr  6  2021 run -> /run
drwxr-xr-x  4 root root  4096 Apr  6  2021 spool
drwxrwxrwt  2 root root  4096 Feb 21 02:18 tmp
drwxr-xr-x  3 root root  4096 Jan 29 18:15 www

5 같이 보기

• 쉘빌트인
• 리눅스 su
• 리눅스 exec
• 리눅스 type
• 리눅스 alias
• 리눅스 watch
• 리눅스 nohup
• 리눅스 chroot
• 리눅스 syntaxhighlight

6 참고

• http://ss64.com/bash/command.html