w - Show who is logged on and what they are doing.
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
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
The PCPU time is the time used by the current process, named in the
- -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
- -s, --short
- Use the short format. Don't print the login time, JCPU or PCPU times.
- -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.
- Display help text and exit.
- -i, --ip-addr
- Display IP address instead of hostname for from field.
- -V, --version
- Display version information.
- -o, --old-style
- Old style output. Prints blank space for idle times less than one
- Show information about the specified user only.
- Override the default width of the username column. Defaults to 8.
- Override the default width of the from column. Defaults to 16.
- information about who is currently logged on
- process information
was re-written almost entirely by Charles Blake, based on the version
Please send bug reports to