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id - print real and effective UIDs and GIDs
id [-gnruG]
[--group] [--name] [--real] [--user] [--groups] [--help] [--version] [username]
This manual page documents the GNU version of id. id prints information
about the given user, or the process running it if no user is specified.
By default, it prints the real user ID, real group ID, effective user
ID if different from the real user ID, effective group ID if different
from the real group ID, and supplemental group IDs. It prints each of
these values preceded by a string identifying it and followed by the corresponding
user or group name in parentheses.
The options cause id to print only part
of the above information.
- -g, --group
- Print only the group ID.
- -G,
--groups
- Print only the supplementary groups.
- --help
- Print a usage message
on standard output and exit successfully.
- -n, --name
- Print the user or group
name instead of the ID number. Requires -u, -g, or -G.
- -r, --real
- Print the real,
instead of effective, user or group ID. Requires -u, -g, or -G.
- -u, --user
- Print
only the user ID.
- --version
- Print version information on standard output
then exit successfully.
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