ac - login accounting
/usr/sbin/ac [ -w wtmp ] [ -p ] [ -d ] [ people ] ...
Ac produces a printout giving connect time for each user who has logged in during the life
of the current wtmp file. A total is also produced. -w is used to specify an alternate
wtmp file. -p prints individual totals; without this option, only totals are printed. -d
causes a printout for each midnight to midnight period. Any people will limit the print-
out to only the specified login names. If no wtmp file is given, /usr/adm/wtmp is used.
The accounting file /usr/adm/wtmp is maintained by init and login. Neither of these pro-
grams creates the file, so if it does not exist 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.
SEE ALSOinit(8), sa(8), login(1), utmp(5).
4th Berkeley Distribution November 16, 1996 AC(8)