id(1) - man - phpman

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⚡ TLDR: id (tldr-pages)

Display current user and group identity.

Display current user's ID (UID), group ID (GID), and groups to which they belong
id
Display the current user identity
id {{-un|--user --name}}
Display the current user identity as a number
id {{-u|--user}}
Display the current primary group identity
id {{-gn|--group --name}}
Display the current primary group identity as a number
id {{-g|--group}}
Display all groups the current user belongs to
id {{-Gn|--groups --name}}
Display an arbitrary user's ID (UID), group ID (GID), and groups to which they belong
id {{username}}
Skip name lookup and specify the UID number explicitly
id +{{uid_number}}

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 each specified USER, or (when USER omitted) for the cur‐
       rent 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: <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       Copyright © 2020 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3  or  later
       <https://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 <https://www.gnu.org/software/coreutils/id>
       or available locally via: info '(coreutils) id invocation'



GNU coreutils 8.32                          January 2026                                       ID(1)