Our server is frequently rebooting need to know the root cause.

Issue

• We have had frequent reboots of server, need to find out the cause of these reboots.

reboot   system boot  2.6.18-194.32.1. Wed Jun 19 13:32         (1+19:15)
reboot   system boot  2.6.18-194.32.1. Tue Jun 18 22:39         (2+10:09)
reboot   system boot  2.6.18-194.32.1. Tue Jun 18 03:59         (3+04:48)