Man page - id(1)

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Package: coreutils
apt-get install coreutils

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ID(1)

User Commands

ID(1)

id - print real and effective user and group IDs

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

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.

Written by Arnold Robbins and David MacKenzie.

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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