.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved. The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\" @(#)ac.8 6.1 (Berkeley) %G%
produces a printout giving
for each user who has logged in
during the life of the current
A total is also produced.
is used to specify an alternate
prints individual totals; without this option,
causes a printout for each midnight to midnight
printout to only the specified login names.
Neither of these programs creates the file,
no connect-time accounting is done.
To start accounting, it should be created with length 0.
On the other hand if the file is left undisturbed it will
grow without bound, so periodically any information
desired should be collected and the file truncated.
init(8), sa(8), login(1), utmp(5).