Something not quite right with your boot up, or how a program behaves? Then head over to your Menu > System Tools > Log File Viewer to find your system logs.
In your log files, you can see your boot process, any error messages that your programs might throw out, so that you can make repairs. Often, I’ve found that doing an internet search for the text of the error message will take me to.the solution in one of the many Linux forums out there in internet land.
Check your update history, your mailer history etc. with ease. If you run a LAMP Server on your system, you can review any problems with your Apache or SQL servers.
So have a look at your logs, you can learn a lot about your system!