id

anima

id
id [options]  [username]
Display information about yourself or another user: user ID, group
ID, effective user ID and group ID if relevant, and additional group
IDs.
Options
-g, --group
Print group ID only.
-G, --groups
Print supplementary groups only.
-n, --name
With -u, -g, or -G, print user or group name, not number.
-r, --real
With -u, -g, or -G, print real, not effective, user ID or group ID.
-u, --user
Print user ID only.
--help
Print help message and then exit.
--version
Print version information.
               
               
               

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/22178/showart_154689.html