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: Don’t print the header.
# w -h root pts/0 17May10 372days 0.01s 0.01s -bash root pts/2 17May10 372days 0.02s 0.02s -bash root pts/3 17May10 372days 0.03s 0.03s -bash root pts/1 18:05 2:01m 0.09s 0.08s bash root pts/5 20:21 0.00s 0.03s 0.01s w -h itsiti pts/8 19May10 370days 0.11s 0.11s -tcsh root pts/10 19May10 370days 0.01s 0.01s -bash oraadm pts/12 19May10 370days 0.12s 0.12s -tcsh
-u: Ignores the username while figuring out the current process and cpu times.
# w -u 20:34:29 up 372 days, 11:13, 8 users, load average: 0.60, 0.23, 0.15 USER TTY LOGIN@ IDLE JCPU PCPU WHAT root pts/0 17May10 372days 0.01s 0.01s -bash root pts/2 17May10 372days 0.02s 0.02s -bash root pts/3 17May10 372days 0.03s 0.03s -bash root pts/1 18:05 2:03m 0.09s 0.08s bash root pts/5 20:21 0.00s 0.04s 0.01s w -u itsiti pts/8 19May10 370days 0.11s 0.11s -tcsh root pts/10 19May10 370days 0.01s 0.01s -bash oraadm pts/12 19May10 370days 0.12s 0.12s -tcsh
-s: Use the short format. Don’t print the login time, JCPU or PCPU times.
# w -s 20:34:55 up 372 days, 11:14, 8 users, load average: 0.71, 0.29, 0.17 USER TTY IDLE WHAT root pts/0 372days -bash root pts/2 372days -bash root pts/3 372days -bash root pts/1 2:03m bash root pts/5 0.00s w -s itsiti pts/8 370days -tcsh root pts/10 370days -bash oraadm pts/12 370days -tcsh
-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.
# w -f 20:35:14 up 372 days, 11:14, 8 users, load average: 0.67, 0.30, 0.18 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT root pts/0 - 17May10 372days 0.01s 0.01s -bash root pts/2 - 17May10 372days 0.02s 0.02s -bash root pts/3 - 17May10 372days 0.03s 0.03s -bash root pts/1 10.3.100.100 18:05 2:04m 0.09s 0.08s bash root pts/5 10.3.100.100 20:21 0.00s 0.05s 0.01s w -f itsiti pts/8 - 19May10 370days 0.11s 0.11s -tcsh root pts/10 - 19May10 370days 0.01s 0.01s -bash oraadm pts/12 - 19May10 370days 0.12s 0.12s -tcsh
user: Show information about the specified user only.
# w root 20:35:45 up 372 days, 11:14, 8 users, load average: 0.47, 0.29, 0.18 USER TTY LOGIN@ IDLE JCPU PCPU WHAT root pts/0 17May10 372days 0.01s 0.01s -bash root pts/2 17May10 372days 0.02s 0.02s -bash root pts/3 17May10 372days 0.03s 0.03s -bash root pts/1 18:05 2:04m 0.09s 0.08s bash root pts/5 20:21 0.00s 0.05s 0.01s w root root pts/10 19May10 370days 0.01s 0.01s -bash
