W(1)

NAME
w - Show who is logged on and what they are doing.

SYNOPSIS
w [options] [user]

DESCRIPTION
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 minutes.

The following entries are displayed for each user: login name, the tty name, the remote host, login time, idle time, JCPU, PCPU, and the command 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 "what" field.

COMMAND-LINE OPTIONS

-h, --no-header
    Don't print the header.

-u, --no-current
    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 -u.

-s, --short
    Use the short format. Don't print the login time, JCPU or PCPU times.

-t, --terminal
    Usually w will use either the systemd sessions table or the utmp file to locate users. In terminal mode w will scan the terminal devices and locate user sessions this way. This is not a true count of users, for example a user with two xterms will show up twice, so the user count in the header will be different. Currently terminal devices scanned are /dev/tty* and /dev/pts/*.

-f, --from
    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.

-i, --ip-addr
    Display IP address instead of hostname for from field.

-p, --pids
    Display pid of the login process/the "what" process in the "what" field. The login process is also called the session leader.

-V, --version
    Display version information.

-o, --old-style
    Old style output. Prints blank space for idle times less than one minute.

user
    Show information about the specified user only.

ENVIRONMENT

PROCPS_USERLEN
    Override the default width of the username column. Defaults to 8.

PROCPS_FROMLEN
    Override the default width of the from column. Defaults to 16.

FILES

/var/run/utmp
    information about who is currently logged on, only for non-systemd hosts.

/proc
    process information

/dev/tty* , /dev/pts/*
    Terminal device files scanned with --terminal mode.

BUGS
When using --terminal option, w assumes processes with a parent PID of 0 or 1 are agetty(8) processes and will not display them. This is prone to both false postive and negative errors.

REPORTING BUGS
Please send bug reports to procps@freelists.org

SEE ALSO
free(1), loginctl(1), ps(1), top(1), uptime(1), who(1), utmp(5), agetty(8)