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This is about an oracle application server running on RHEL platform(Linux prod.xyz.com 2.6.18-194.el5PAE #1 SMP Mon Mar 29 20:19:03 EDT 2010 i686 i686 i386 GNU/Linux). All of a sudden all the application services shut down abnormally on weekend. On the first day of the week, business users were unable to login as a result. For root cause investigation, we were unable to findout anything in the application logs. But were trying to get reboot/shutdown information from the system.....but we are bit confused with the info in /var/log/wtmp by using 'last' command(output given bellow):
[root@prod ~]# last reboot |head -2
reboot system boot 2.6.18-194.el5PA Mon Aug 8 11:26 (1+03:10)
reboot system boot 2.6.18-194.el5PA Sun Aug 7 17:27 (17:55)
We doubt the server might have gone down on Sunday(7th Aug) but there's also an entry of 8th Aug, on which day the server was running fine, no reboot/shutdown happened.
Kindly review the above output and suggest.
Also please highlight on this, if there any other way of getting info on reboot timings