w Command Cheat Sheet

w shows who is logged on and what they are doing.

Synopsis

w [options] [user]

Basic Usage

w

Output Breakdown: 1. Header: Current time, uptime, users, load average (same as uptime). 2. User Table: - USER: Login name. - TTY: Terminal name (pts/0). - FROM: Remote host IP. - LOGIN@: Login time. - IDLE: Idle time. - JCPU: Time used by all processes attached to the tty. - PCPU: Time used by the current process (in WHAT column). - WHAT: The command currently running.

Options

No Header (-h)

Suppress the header (useful for scripts).

w -h

Short Format (-s)

Omit the login time, JCPU, and PCPU times.

w -s

Check Specific User

w john

Notes

• Privacy: w reveals what other users are running on the system.