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AC(8)			FreeBSD	System Manager's Manual			 AC(8)

NAME
     ac	-- connect time	accounting

SYNOPSIS
     ac	[-dp] [-t tty] [-w wtmp] [users	...]

DESCRIPTION
     If	the file /var/log/wtmp exists, a record	of individual login and	logout
     times are written to it by	login(1) and init(8), respectively.  Ac	exam-
     ines these	records	and writes the accumulated connect time	(in hours) for
     all logins	to the standard	output.

     The options are as	follows:

     -d		Display	the connect times in 24	hour chunks.

     -p		Print individual users'	totals.

     -t	tty	Only do	accounting logins on certain ttys.  The	tty specifica-
		tion can start with '!'	to indicate not	this tty and end with
		'*' to indicate	all similarly named ttys.  Multiple -t flags
		may be specified.

     -w	wtmp	Read connect time data from wtmp instead of the	default	file,
		/var/log/wtmp.

     users ...	Display	totals for the given individuals only.

     If	no arguments are given,	ac displays the	total connect time for all
     accounts with login sessions recorded in wtmp.

     The default wtmp file will	increase without bound unless it is truncated.
     It	is normally truncated by the daily scripts run by cron(8), which
     rename and	rotate the wtmp	files, keeping a week's	worth of data on hand.
     No	login or connect time accounting is performed if /var/log/wtmp does
     not exist.

     For example,

     ac	-p -t "ttyd*" >	modems
     ac	-p -t "!ttyd*" > other

     allows times recorded in modems to	be charged out at a different rate
     than other.

DIAGNOSTICS
     The ac utility exits 0 on success,	and >0 if an error occurs.

FILES
     /var/log/wtmp  connect time accounting file

SEE ALSO
     login(1), utmp(5),	init(8), sa(8)

FreeBSD	10.1			March 15, 1994			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | DIAGNOSTICS | FILES | SEE ALSO

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