v7 man page for id

ID(1)								   User Commands							     ID(1)

NAME
       id - print real and effective user and group IDs

SYNOPSIS
       id [OPTION]... [USER]

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

       -a     ignore, for compatibility with other versions

       -Z, --context
	      print only the security context of the process

       -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

       -z, --zero
	      delimit entries with NUL characters, not whitespace;

	      not permitted in default format

       --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
       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report id translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2017 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
       Full documentation at: <http://www.gnu.org/software/coreutils/id>
       or available locally via: info '(coreutils) id invocation'

GNU coreutils 8.28						   January 2018 							     ID(1)