Print user and group information for the specified USERNAME, or (when USERNAME omitted) for the current user.
-a ignore, for compatibility with other versions
print only the security context of the current user
print only the effective group ID
print all group IDs
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
--help display this help and exit
output version information and exit
Without any OPTION, print some useful set of identified information.
The full documentation for id is maintained as a Texinfo manual. If the info and id programs are properly installed at your site, the
should give you access to the complete manual.
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