# mkdir /var/account
# touch /var/account/pacct && chmod 660 /var/account/pacct
# /sbin/accton /var/account/pacct
-------------------------
# chkconfig psacct on
# /sbin/service psacct start
-------------------------
# chkconfig acct on
# /sbin/service acct start
-------------------------
[andrew@colossus andrew]$ ac
        total      106.23
-------------------------
# ac -p
        root                                 0.07
        andrew                             106.05
        total      106.12
-------------------------
# lastcomm andrew
ls                      andrew   ??         0.01 secs Mon Dec 15 05:58
rpmq                    andrew   ??         0.08 secs Mon Dec 15 05:58
sh                      andrew   ??         0.03 secs Mon Dec 15 05:44
gunzip                  andrew   ??         0.00 secs Mon Dec 15 05:44

# lastcomm bash 
bash               F    andrew   ??         0.00 secs Mon Dec 15 06:44
bash               F    root     stdout     0.01 secs Mon Dec 15 05:20
bash               F    root     stdout     0.00 secs Mon Dec 15 05:20
bash               F    andrew   ??         0.00 secs Mon Dec 15 05:19
-------------------------
# sa
      14       0.04re       0.03cp         0avio      1297k   troff
       7       0.03re       0.03cp         0avio       422k   lastcomm
       2      63.90re       0.01cp         0avio       983k   info
      14      34.02re       0.01cp         0avio       959k   less
      14       0.03re       0.01cp         0avio      1132k   grotty
      44       0.02re       0.01cp         0avio       432k   gunzip
-------------------------
# sa -u
root       0.01 cpu      344k mem      0 io which 
root       0.00 cpu     1094k mem      0 io bash
root       0.07 cpu     1434k mem      0 io rpmq
andrew     0.02 cpu      342k mem      0 io id
andrew     0.00 cpu      526k mem      0 io bash
andrew     0.01 cpu      526k mem      0 io bash
andrew     0.03 cpu      378k mem      0 io grep
andrew     0.01 cpu      354k mem      0 io id
andrew     0.01 cpu      526k mem      0 io bash
andrew     0.00 cpu      340k mem      0 io hostname
