I have a server which is hanging more times than I would like, are there any logs in particular that would be worth examining to determine the reason?

`/var/log/messages` has nothing of note `/var/log/dmesg` is also not useful.

The machine hangs in that there is no response from a network ping, nothing on the console screen but it still has power. You have to press and hold the off button to turn it off before it will turn on.

The main service is `samba` (it is the domain controller), also `pptp`, `dhcp` and `bind`.

It seems it was a problem with the power supply. Thanks for spending the time answering and for the suggestion.