W(1) User Commands W(1)
w - Show who is logged on and what they are doing.
w [options] 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
Don't print the header.
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
Use the short format. Don't print the login time, JCPU or PCPU
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.
--help Display help text and exit.
Display IP address instead of hostname for from field.
Display version information.
Old style output. Prints blank space for idle times less than
user Show information about the specified user only.
Override the default width of the username column. Defaults to
Override the default width of the from column. Defaults to 16.
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 <[email protected]> and Michael K. Johnson
Please send bug reports to <[email protected]>
procps-ng May 2012 W(1)