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W(1)			  BSD General Commands Manual			  W(1)

     w -- display who is logged	in and what they are doing

     w [-dhin] [-M core] [-N system] [user ...]

     The w utility prints a summary of the current activity on the system, in-
     cluding what each user is doing.  The first line displays the current
     time of day, how long the system has been running,	the number of users
     logged into the system, and the load averages.  The load average numbers
     give the number of	jobs in	the run	queue averaged over 1, 5 and 15	min-

     The fields	output are the user's login name, the name of the terminal the
     user is on, the host from which the user is logged	in, the	time the user
     logged on,	the time since the user	last typed anything, and the name and
     arguments of the current process.

     The options are as	follows:

     -d	     dumps out the entire process list on a per	controlling tty	basis,
	     instead of	just the top level process.

     -h	     Suppress the heading.

     -i	     Output is sorted by idle time.

     -M	     Extract values associated with the	name list from the specified
	     core instead of the default "/dev/kmem".

     -N	     Extract the name list from	the specified system instead of	the
	     default "/boot/kernel/kernel".

     -n	     Don't attempt to resolve network addresses	(normally w interprets
	     addresses and attempts to display them as names).

     If	one or more user names are specified, the output is restricted to
     those users.

     /var/run/utmp  list of users on the system

     finger(1),	ps(1), uptime(1), who(1)

     The notion	of the "current	process" is muddy.  The	current	algorithm is
     ``the highest numbered process on the terminal that is not	ignoring in-
     terrupts, or, if there is none, the highest numbered process on the ter-
     minal''.  This fails, for example,	in critical sections of	programs like
     the shell and editor, or when faulty programs running in the background
     fork and fail to ignore interrupts.  (In cases where no process can be
     found, w prints "-".)

     The CPU time is only an estimate, in particular, if someone leaves	a
     background	process	running	after logging out, the person currently	on
     that terminal is "charged"	with the time.

     Background	processes are not shown, even though they account for much of
     the load on the system.

     Sometimes processes, typically those in the background, are printed with
     null or garbaged arguments.  In these cases, the name of the command is
     printed in	parentheses.

     The w utility does	not know about the new conventions for detection of
     background	jobs.  It will sometimes find a	background job instead of the
     right one.

     The -f, -l, -s, and -w flags are no longer	supported.

     The w command appeared in 3.0BSD.

BSD				 June 6, 1993				   BSD


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