Thank you very much for your reply . So you mean under the /var/log/messages it is distinguishable that which logs come from operator initiated reboot and which ones come from sudden power cut and then booting from scratch when power resumed ? Am I correct ?
On Sat, Oct 29, 2016 at 11:44 PM, John R Pierce pierce@hogranch.com wrote:
On 10/29/2016 10:12 PM, Hadi Motamedi wrote:
I am using a centos server for cdr billing and mediation device on a remote network. I am experiencing problem that I am suspicious it comes from main supply power cut at the remote site. The power supply to the remote site comes from battery charger that will be automatically switched in circuit under main supply power cut but cannot provide adequate power for more than 2 hours . I am suspicious that the remote system is suffering from many frequent main supply power cut . Can you please do me favor and let me know if there is any log on my centos server that I can check to see if there would be many frequent power cut there ?
look at /var/log/messages for reboots without shutdowns.
centos 6 linux boot starts logging something like...
Oct 25 15:01:25 new kernel: imklog 5.8.10, log source = /proc/kmsg started. Oct 25 15:01:25 new rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="2740" x-info="http://www.rsyslog.com"] start Oct 25 15:01:25 new kernel: Initializing cgroup subsys cpuset Oct 25 15:01:25 new kernel: Initializing cgroup subsys cpu Oct 25 15:01:25 new kernel: Linux version 2.6.32-642.6.1.el6.x86_64 ( mockbuild@worker1.bsys.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-17) (GCC) ) #1 SMP Wed Oct 5 00:36:12 UTC 2016
followed by tons more about all the stuff starting up....
when its properly shutdown, you'd see something like this after everything has stopped
Oct 25 14:20:36 new init: Disconnected from system bus Oct 25 14:20:38 new rpcbind: rpcbind terminating on signal. Restart with "rpcbind -w" Oct 25 14:20:38 new auditd[2704]: The audit daemon is exiting. Oct 25 14:20:38 new kernel: type=1305 audit(1477430438.399:37765): audit_pid=0 old=2704 auid=4294967295 ses=4294967295 res=1 Oct 25 14:20:38 new kernel: type=1305 audit(1477430438.497:37766): audit_enabled=0 old=1 auid=4294967295 ses=4294967295 res=1 Oct 25 14:20:38 new kernel: Kernel logging (proc) stopped. Oct 25 14:20:38 new rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="2738" x-info="http://www.rsyslog.com"] exiting on signal 15.
if its booted without a clean shutdown, it will do some file system checking and such while starting.
-- john r pierce, recycling bits in santa cruz
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