W(1) Linux Users Manual W(1)
w - Show who is logged on and what they are doing.
w [-husfVo] [user]
w displays information about the users currently on the machine, and
their processes. The header shows, in this order, the current time,
how long the system has been running, how many users are currently
logged on, and the system load averages for the past 1, 5, and 15 min
The following entries are displayed for each user: login name, the tty
name, the remote host, login time, idle time, JCPU, PCPU, and the com
mand line of their current process.
The JCPU time is the time used by all processes attached to the tty.
It does not include past background jobs, but does include currently
running background jobs.
The PCPU time is the time used by the current process, named in the
-h Dont print the header.
-u Ignores the username while figuring out the current process and
cpu times. To demonstrate this, do a "su" and do a "w" and a "w
-s Use the short format. Dont print the login time, JCPU or PCPU
-f Toggle printing the from (remote hostname) field. The default as
released is for the from field to not be printed, although your
system administrator or distribution maintainer may have compiled
a version in which the from field is shown by default.
-V Display version information.
-o Old style output. Prints blank space for idle times less than one
user Show information about the specified user only.
information about who is currently logged on
/proc process information
free(1), ps(1), top(1), uptime(1), utmp(5), who(1)
w was re-written almost entirely by Charles Blake, based on the version
by Larry Greenfield and Michael K. Johnson
Please send bug reports to
8 Dec 1993 W(1)