Introduction to who command examples in Linux

About who

Displays users logged into the system. Executing the who command will tell you which users are currently logged into the system. Executing the who command alone will list the login account, the terminal used, the login time, and where they logged in from or which X display they are using.

describe

The who command prints information about all users who are currently logged in.

who syntax

who [ OPTION ]... [ FILE ] [ am i ]

Options

notes

If a file is specified, who collects its information from that file. Otherwise, it reads from the default file location (usually /var/run/utmp).

If the argument "ami" is specified, who assumes the -m option.

who Example

linuxidc@linuxidc:~$ who

Version View

Displays the username, line, and time of all current login sessions. For example:

who am i

Displays the same information, but only for the terminal session in which the command was issued, for example:

linuxmi pts/3 2018-12-02 08:52 (:0.0)

Displays "all" information along with a heading above each column of data, for example:

linuxidc@linuxidc:~$ who -aH

 
Name Line Time Idle Process Number Remarks Exit System Boot 2018-12-02 07:45

Run level 5 2018-12-02 07:46

linuxidc ? :0 2018-12-02 07:47 ? 4569 (:0) 

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