Linux command-W: Displays the logged-on user and the currently executing task

Command format

W-[HUSFV] [user]

Command parameters

-H
Do not print header information

-U
Ignores the user name when the current process and CPU time are listed, which is primarily the case after the SU command is executed.

-S
Use short format, do not print [email protected], JCPU and PCPU information

-F
Toggle display from Item information

-V
Display version Information

Instance

A) displays user information for the currently logged on system

W 23:06:04 up 1:15, 4 users, Load average:0.00, 0.01, 0.05USER     TTY      from              [email protected]   IDL E   jcpu   PCPU whathuey     pts/1    192.168.1.105    21:52    6.00s  0.52s  0.00s Wsugar    PTS/2    192.168.1.105    21:56   20.00s  0.47s  0.47s-bash

Message meaning

The fields in the top message are interpreted as:

Field	Meaning
14:21:33	Current system time
Up 1:15	Uptime (uptime), the total number of times calculated from the last start of the machine.
2 users	There are 2 users logged in
Load average:0.27, 0.33, 0.34	Load average is the number of processes waiting to run, that is, the number of processes in the running state that share CPU resources. The three values shown correspond to different time periods. The first corresponds to the mean value of the first 60 seconds, the second corresponds to the mean of the first 5 minutes, and the last 15 minutes of the mean value. The average value is less than 1.0 the machine is not busy.

What the column headings mean:

Title	Meaning
USER	Login User's account
Tty	User-Logged Control terminal
From	Where the user logs on
[Email protected]	time when the user logs on to the system
IDLE	User idle time, timed from the end of the user's last task
Jcpu	The CPU time spent by all the processes connected to TTY, excluding the job time of the previous background task, but including the job time of the current background task
PCPU	CPU time that is consumed by the current process execution
What	Tasks currently performed by the user

Related commands

Who-show logged-on user status

Linux command-W: Displays the logged-on user and the currently executing task