[GRLUG] Rebooting linux server

[Collin Kidder]

I have a server running Debian 6.0.5. It likes to reboot at random. I 
get uptimes which range between about 8 hours and 8 days. There doesn't 
appear to be much rhyme or reason for this. The server is a ProLiant 
DL380 G3 and I do have redundant power supplies installed. I've tried 
looking at the logs but of course anything which happened too close to 
the time of the reboot seems to have not passed from cache to disk 
before the sudden reboot so all I see are normal log entries, a gap,  
and then messages as processes start up upon reboot. I think there might 
be reason to suspect some sort of hardware failure but the machine 
doesn't seem to be indicating to me that anything failed.

I'm not exactly a server administration wizard so what should I be 
looking for to try to figure this out?