Print summaries of system usage, currently logged-in users, and what those users are doing. w is essentially a combination of uptime, who, and ps -a. Display output for one user by specifying user.
Toggle printing the from (remote hostname) field.
Suppress headings and uptime information.
Use the short format.
Ignore the username while figuring out the current process and CPU times.
Display version information.
List of users currently logged in.