Linux -- id

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ID(1)                            User Commands                           ID(1)



NAME
       id - print real and effective user and group IDs

SYNOPSIS
       id [OPTION]... [USERNAME]

DESCRIPTION
       Print  user  and group information for the specified USERNAME, or (when
       USERNAME omitted) for the current user.

************************************************************************************

       -u, --user
              print only the effective user ID

       -g, --group
              print only the effective group ID

       -G, --groups
              print all group IDs

　　　　　　

以下選項均要配合 -u  -g or -G 中的一個

       -n, --name
              print a name instead of a number, for -ugG
             
       -r, --real
              print the real ID instead of the effective ID, with -ugG

 

******************************************************************************************

       -a     ignore, for compatibility with other versions

       -Z, --context
              print only the security context of the current user

       --help display this help and exit

       --version
              output version information and exit

       Without any OPTION, print some useful set of identified information.

AUTHOR
       Written by Arnold Robbins and David MacKenzie.

REPORTING BUGS
       Report id 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/>
       Report id translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright © 2013 Free Software Foundation, Inc.   License  GPLv3+:  GNU
       GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This  is  free  software:  you  are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       The full documentation for id is maintained as a  Texinfo  manual.   If
       the  info and id programs are properly installed at your site, the com‐
       mand

              info coreutils ‘id invocation‘

       should give you access to the complete manual.



GNU coreutils 8.21                March 2014                             ID(1)

Linux -- id