Linux Command Encyclopedia disk maintenance: WHO

Function Description: Display the current login system http://www.aliyun.com/zixun/aggregation/10619.html "> user information."

Grammar: Who [-himqsw][--help][--version][am i][record file]

Supplementary note: The implementation of this directive can be learned that the current user login system, the individual implementation of the WHO command will be listed in the login account, the use of
Terminal, login time and where to log in or use which x monitor.

Parameters：
-h or--heading display header information columns for each field.
-I or-u or--idle display idle time, if the user in the first minute of any action, will be marked as "." Number, if the user has no action for more than 24 hours, then the "old" string is marked.
-M The effect of this parameter is the same as the specified ' Am I ' string.
-Q or--count only displays the account name and total number of the login system.
-S This parameter ignores no processing and is responsible only for resolving compatibility issues with other versions of the WHO directive.
-W or-t or--MESG or--message or--writable displays the user's information status bar.
--help online Help.
--version Displays version information.