4.9 rebooting

[Jim Pazarena]

I have a remote server which has begun re-booting every few days.

Are there any logs which I can examine that may provide a clue as to
the reason? Or any logging I can turn "on/up" ? I realize that
during a reboot, logs are seldom "up-to-date", but any clue would
be handy.

This is a remote co-located server which will take a fairly
expensive trip to get hands-on with. I'd like to have ammunition
at hand before I commit to the trip.

Thanks,
Jim