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How to understand the Linux basic command display login user w, for this problem, this article details the corresponding analysis and solution, hoping to help more small partners who want to solve this problem find a simpler and easier way.

w

Shows which users are logged in and what they are doing. The header displays, in this order, the current time, the system runtime, the number of currently logged in users, and the average system load for the past 1, 5, and 15 minutes. The following entries are then displayed for each user: login name, TTY name, remote host, login time, idle time, JCPU, PCPU, and command line for the current process. JCPU time is the time used by all processes attached to the TTY. It does not include background jobs from the past, but it does include background jobs that are currently running. PCPU time is the time used by the current process, named in the "what" field.

This command applies to Red Hat, RHEL, Ubuntu, CentOS, SUSE, openSUSE, Fedora.

1. Grammar

w [options] [user]

2. Option list

option

description

-h

Do not display title bar

-u

Ignoring the name and cpu time of the executing program

-s

Use short format, do not display login time, JCPU and PCPU time

-f

Show where users log in from

-V

output version information

3. Documents

/var/run/utmp, information about the user who is logging in.

/proc process information.

4. Examples

Display logged in user information

[root@localhost ~]# w

08:53:05 up 3 days, 18:42, 4 users, load average: 0.00, 0.00, 0.00

USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT

david tty7 :0 Sat20 15days 1.99s 0.00s pam: gdm-password

root pts/0 :1.0 Sat20 0.00s 0.08s 0.00s w

root pts/1 :1.0 21:28 11:24m 0.00s 0.00s bash

root tty1 :1 Sat20 15days 18.07s 18.07s /usr/bin/Xorg :1 -br -verbose -audi

[root@localhost ~]#

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