Linux Command Directory
This directory of Linux commands is from Linux in a Nutshell, 5th Edition.
Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.
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.
Print group ID only.
Print supplementary groups only.
With -u, -g, or -G, print user or group name, not number.
With -u, -g, or -G, print real, not effective, user ID or group ID.
Print user ID only.
Print help message and then exit.
Print version information.