last, uptime - display recent on-line session records, show uptime
last [-f file] [-r] [-n] [name] [tty] ...
-f Use file instead of /usr/adm/wtmp
-r Search backwards only to last reboot
-u Print uptime since last reboot
-n Print a maximum of n lines
last reboot # When was the system last rebooted?
last ast # When was the last login for ast?
last -10 tty00 tty01
# Display last 10 logins on tty00 or tty01
uptime # Display uptime (likewise last -u)
Last Searches backward through the login administration file (default is
/usr/adm/wtmp), printing information about previous logins and reboots.
During a long search, the SIGQUIT signal (CTRL-\) causes last to display
how far back it has gone; it then continues.
Uptime, an alias for last -u, displays the time the system is running
since the last reboot.