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OpenDarwin 7.2.1 - man page for last (opendarwin section 1)

LAST(1) 				     BSD General Commands Manual				      LAST(1)

last -- indicate last logins of users and ttys
last [-n] [-f file] [-h host] [-t tty] [user ...]
Last will list the sessions of specified users, ttys, and hosts, in reverse time order. Each line of output contains the user name, the tty from which the session was conducted, any hostname, the start and stop times for the session, and the duration of the session. If the session is still continuing or was cut short by a crash or shutdown, last will so indicate. -f file Last reads the file file instead of the default, /var/log/wtmp. -n Limits the report to n lines. -t tty Specify the tty. Tty names may be given fully or abbreviated, for example, ``last -t 03'' is equiv- alent to ``last -t tty03''. -h host Host names may be names or internet numbers. If multiple arguments are given, the information which applies to any of the arguments is printed, e.g., ``last root -t console'' would list all of ``root's'' sessions as well as all sessions on the console terminal. If no users, hostnames or terminals are specified, last prints a record of all logins and logouts. The pseudo-user reboot logs in at reboots of the system, thus ``last reboot'' will give an indication of mean time between reboot. If last is interrupted, it indicates to what date the search has progressed. If interrupted with a quit signal last indicates how far the search has progressed and then continues.
/var/log/wtmp login data base
lastcomm(1), utmp(5), ac(8)
Last appeared in 3.0BSD. 4th Berkeley Distribution June 6, 1993 4th Berkeley Distribution

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