I am suspecting that a Windows user logged onto my computer with my password. So, is it possible that I can see a trace of logging in on my computer?
Get the user login history at any time
last command will give login history for a specific username. If we don’t give any argument for this command, it will list login history for all users. By default this information will read from
/var/log/wtmp file. The output of this command contains the following columns:
- User name
- Tty device number
- Login date and time
- Logout time
- Total working time
jason pts/0 dev-db-server Fri Mar 27 22:57 still logged in jason pts/0 dev-db-server Fri Mar 27 22:09 - 22:54 (00:45) jason pts/0 dev-db-server Wed Mar 25 19:58 - 22:26 (02:28) jason pts/1 dev-db-server Mon Mar 16 20:10 - 21:44 (01:33) jason pts/0 192.168.201.11 Fri Mar 13 08:35 - 16:46 (08:11) jason pts/1 192.168.201.12 Thu Mar 12 09:03 - 09:19 (00:15) jason pts/0 dev-db-server Wed Mar 11 20:11 - 20:50 (00:39
You can also use the command
lastlog command on Linux. It gives you more granular controls as to ranges of dates when looking through the logs of user logins.
lastlog man page:
lastlog - reports the most recent login of all users or of a given user
Example: To find out the users that have logged into a system in the last 100 days.
$ lastlog -b 0 -t 100 Username Port From Latest sam pts/0 pegasus Wed Jan 8 20:32:25 -0500 2014 joe pts/0 192.168.1.105 Thu Dec 12 12:47:11 -0500 2013
This shows that the last times these users logged into this system. The range of time shows the last 100 days. Before today (-b 0) and after 100 days ago (-t 100).
You can also show all the users by omitting any range and just seeing every usre that's ever logged in, and the last time they logged in.
You can use
last to show you the last logins. There is also a log file for authentication specific actions in