rất đơn giản bạn chỉ cần gỏ lệnh sau:
last -x -f /var/log/wtmp
nó liệt kế cho bạn như sau:
root pts/0 192.168.11.67 Tue Apr 1 09:12 - 09:18 (00:05)
root pts/0 113.187.17.33 Tue Apr 1 07:01 - 07:02 (00:00)
root pts/0 192.168.11.67 Mon Mar 31 14:00 - 14:03 (00:02)
root pts/1 192.168.11.67 Sat Mar 29 15:43 - 16:28 (00:44)
root pts/1 192.168.11.67 Sat Mar 29 08:08 - 08:21 (00:12)
root pts/1 113.187.17.61 Sat Mar 29 06:29 - 06:30 (00:01)
root pts/1 113.187.17.55 Sat Mar 29 00:49 - 00:51 (00:02)