功能說明：顯示用戶的ID，以及所屬群組的ID。

語法：id[-gGnru][--help][--version][用戶名稱]

補充說明：id會顯示用戶以及所屬群組的實際與有效ID。若兩個ID相同，則僅顯示實際ID。若僅指定用戶名稱，則顯示目前用戶的ID。

參數：

-g或--group顯示用戶所屬群組的ID。

-G或--groups顯示用戶所屬附加群組的ID。

-n或--name顯示用戶，所屬群組或附加群組的名稱。

-r或--real顯示實際ID。

-u或--user顯示用戶ID。

-help顯示幫助。

-version顯示版本信息。

#p#

NAME

id - print real and effective UIDs and GIDs  

SYNOPSIS

id [OPTION]... [USERNAME]  

DESCRIPTION

Print information for USERNAME, or the current user.

-a

ignore, for compatibility with other versions

-Z, --context

print only the security context

-g, --group

print only the effective group ID

-G, --groups

print all group IDs

-n, --name

print a name instead of a number, for -ugG

-r, --real

print the real ID instead of the effective ID, with -ugG

-u, --user

print only the effective user ID

--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 bugs to <bug-coreutils@gnu.org>.  

COPYRIGHT

Copyright © 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

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 command

info coreutils id

should give you access to the complete manual.