[CentOS] Power Cut

Wed Nov 2 16:36:54 UTC 2016
m.roth at 5-cent.us <m.roth at 5-cent.us>

Leroy Tennison wrote:
> Don't know how much control you have over the remote situation but some
> UPSes have their own logs which should show this.  Also, some UPSes have
> add-in boards providing network connections with various services.  If
> these outages are costing enough money and the remote UPS doesn't have the
> add-in card but does have the capability of adding one you might be able
> to justify the expense.

Please don't top post.

Here at work, all our UPSes (mostly APC SmartUPS, but a few others, we use
apcupsd to monitor them, and cron jobs to log.

> ----- Original Message -----
> From: "Ted Miller" <centos-user at millert.e4ward.com>
> To: centos at centos.org, "Hadi Motamedi" <motamedi24 at gmail.com>
> Sent: Tuesday, November 1, 2016 8:00:48 PM
> Subject: Re: [CentOS] Power Cut
> On 10/30/2016 01:12 AM, Hadi Motamedi wrote:
>> Dear All
>> 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 ?
>> Thank you for your time
> I have been experiencing a similar situation with a remote server, and
> found it much easier to use the command:
>    last -x | tail -n50
> to see reboots.  You can tell a power cut because the end time for the
> previous boot up will be the same as the begin time for the next boot.  If
> it is an orderly shutdown, there will be a time gap that is logged.  As I
> understand it, the 'last' command uses the data stored in /var/log/wtmp,
> but that information is not in human-readable format.
> Ted Miller
> Indiana, USA
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