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 at 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