id

Examples (TL;DR)

• Display current user's id (UID), group id (GID) and groups to which they belong: id
• Display the current user identity as a number: id -u
• Display the current group identity as a number: id -g
• Display an arbitrary user's id (UID), group id (GID) and groups to which they belong: id username

tldr.sh

Synopsis

id [OPTION]... [USER]...

Description

Print user and group information for each 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: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>

Copyright

Copyright © 2019 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'

Referenced By

credentials(7), newgrp(1), qaxbase.3qt(3), sg(1), strace(1).