Server goes down often, needs rebooting

In the past week, about every 2 days my server has stopped responding and had to be rebooted. I have had the server for over 6 months and never had to reboot before.

However I need to know what I need to do to find out the cause of the problem and fix it. The server load does not run high on this server, it serves mostly static web sites and email. The load is usually about .5

It is a 2.4 celeron with 1GB of memory. The server runs RHE 3.0 and Cpanel. I do not run mailscanner or exiscan. No new software has been installed lately. I do not give SSH access to others.

Where do I start looking? If it is a log, which log, and where is it located? Thanks!

 

 

 

 

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