last(1)
NAME
last − indicate last logins of users and teletypes
SYNTAX
last [−N ] [name...] [tty...]
DESCRIPTION
The last command will look back in the /usr/admin/wtmp file which records all logins and logouts for information about a user, a teletype or any group of users and teletypes. Arguments specify names of users or teletypes of interest. Names of teletypes may be given fully or abbreviated. For example “last 0” is the same as “last tty0”. If multiple arguments are given, the information which applies to any of the arguments is printed. For example “last root console” would list all of “root’s” sessions as well as all sessions on the console terminal. The last command prints the sessions of the specified users and teletypes, most recent first, indicating the times at which the session began, the duration of the session, and the teletype which the session took place on. If the session is still continuing or was cut short by a reboot, then the last command will so indicate.
The pseudo-user reboot logs in at reboots of the system:
last reboot
This entry gives an indication of mean time between reboot.
Specifying last with no arguments prints a record of all logins and logouts, in reverse order. The −N option limits the report to N lines.
If the last command is interrupted, it indicates how far the search has progressed in /usr/admin/wtmp. If interrupted with a quit signal (generated by a control-\ ) the last command indicates how far the search has progressed so far, and the search continues.
FILES
/usr/adm/wtmplogin data base