Linux Administration

W -Command

Purpose

Display who is logged into the Linux/Unix server and what they are doing at command execution time

Syntax

The basic syntax is looks like this 

w
w [UserNameHere]
w [UserNameHere1] [UserNameHere2]
w [options]
w [options] [UserNameHere]

Understanding w command output / header

The w command shows the following information about each user and their process on the system:

1. USER – User name.
2. TTY – Terminal type such as pts/0 or console.
3. FROM – The remote host name or IP address.
4. LOGIN@ – Login time.
5. IDLE – Idel time.
6. JCPU – The JCPU time is the time used by all processes attached to the tty.
7. PCPU – The PCPU time is the time used by the current process displayed in WHAT field.
8. WHAT – The command line of USER’s current process.

w command examples

To see who is currently logged in and what they are doing on your Linux/Unix-based server, type:
$ w