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Checking a user's login history

Checking a user's login history

The user's login history will be output to the /var/run/utmp and /var/log/wtmp files.
This file, like the /var/log/lastlog and /var/log/btmp files, is a binary file, so it cannot be displayed by the less, cat, or tail commands.
To display it, use the dedicated /usr/bin/last command.

[root@Lion ~]# last
tama pts/0 192.168.0.162 Wed Oct 10 12:21 still logged in
reboot system boot 2.6.32-279.el6.i Wed Oct 10 12:20 - 12:37 (00:17)
root tty1 Fri Aug 24 13:45 - down (00:00)
tama ftpd1456 192.168.0.162 Fri Aug 24 13:43 - 13:44 (00:01)
tama ftpd1455 192.168.0.162 Fri Aug 24 13:43 - 13:44 (00:01)
tama ftpd1446 192.168.0.162 Fri Aug 24 13:42 - down (00:03)

Display login history by specifying a user name.

By specifying a user name as an argument, you can view the login history of a specific user.

[root@Lion ~]# last tama
tama pts/0 192.168.0.162 Wed Oct 10 12:21 still logged in
tama ftpd1456 192.168.0.162 Fri Aug 24 13:43 - 13:44 (00:01)
tama ftpd1455 192.168.0.162 Fri Aug 24 13:43 - 13:44 (00:01)
tama ftpd1446 192.168.0.162 Fri Aug 24 13:42 - down (00:03)
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