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 current process.

-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 -u, -g, -G

-r, --real: print the real ID instead of the effective ID, with -u, -g, -G

-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

Report bugs to: <[email protected]>.
Report any translation bugs to: <https://translationproject.org/team/>.
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
General help using GNU software: <https://www.gnu.org/gethelp/>

COPYRIGHT

Copyright © 2026 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.