Re: [CentOS] Power Cut

[m . roth]

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.

 mark
>
> - Original Message -
> From: "Ted Miller" <centos-u...@millert.e4ward.com>
> To: centos@centos.org, "Hadi Motamedi" <motamed...@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
>
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>


___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Leroy Tennison]

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.

- Original Message -
From: "Ted Miller" <centos-u...@millert.e4ward.com>
To: centos@centos.org, "Hadi Motamedi" <motamed...@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

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Leonard den Ottolander]

Hello Hadi,

On Sat, 2016-10-29 at 22:12 -0700, Hadi Motamedi wrote:
> 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 ?

People have already pointed you to dmesg and /var/log/messages.

To receive an email every time it gets rebooted put the below lines
in /etc/rc.d/rc.local (or wrap them in a script and add a reference to
that):

mail -s "Server  rebooted" y...@example.com << ENDOFMESSAGE
Server  has been rebooted.
ENDOFMESSAGE

This of course will only notify you after the fact and will be no good
if the system stays down.

Regards,
Leonard.

-- 
mount -t life -o ro /dev/dna /genetic/research


___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Ted Miller]

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

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[John R Pierce]

On 10/30/2016 12:47 AM, Ned Slider wrote:

On 30/10/16 07:11, Hadi Motamedi wrote:

But the site is far remote and having alert on battery exhaustion can no
longer help . As I said before , I am suspicious if it comes from 
frequent
power cuts so seeking some means to distinguish it among the system 
logs.


Your UPS should be capable of logging to /var/log/messages and should 
also be capable of powering down the system cleanly when the battery 
reaches a predetermined critical level (either run time remaining or 
percentage charge), so there shouldn't be any uninitiated shutdowns. 
The UPS logs should tell you exactly how many power outages you are 
getting together with how long each one lasts. It sounds like you 
haven't configured your UPS.


if its a proper enterprise/server grade commercial UPS, you should be 
able to monitor the charge state of the battery via the USB network 
interface...  I don't know what sort of UPS this is, and I've seen some 
pictures of some awful things in the third world that use a charger 
module, and a bunch of old car batteries on the floor, and an inverter,  
running whole households during the regular afternoon brownouts.   I 
don't think those sorts of things *have* network monitoring, but 
enterprise grade UPS's like newer SmartUPS, Eaton PowerWare, etc DO have 
this ability.APC tend to be worse at this than most of the better 
alternatives like Eaton.


if this UPS *does* have any sort of thing that will give you battery 
state information, use NUT, the Network UPS Tool, on linux, and if 
you're dealing with a homebrew UPS, build your own module that can 
monitor that voltage.   I would use NUT initiate an OS shutdown when you 
get to 20% battery charge state, which is around 12.0VDC (fully charged 
12V lead acid battery is 12.6VDC, on the AC powered charger, its more 
like 13.8-14.1V). NUT is quite powerful, and very flexible.   one 
server could monitor the UPS (maybe even via using a USB digital volt 
meter module connected directly to the batteries), and that master NUT 
node could tell all the other nodes/systems to shutdown, too.


Letting this sort of homebrew UPS fully run down the batteries to 
totally dead shortens the batteries life. if you could shut the 
systems AND the UPS off at before the batteries are totally run down, 
they'll last a lot longer.


if this UPS is the homebrew third world bodge I described, you could 
pretty easily build a NUT master w/ a raspberry pi and a ADC 'hat'






--
john r pierce, recycling bits in santa cruz

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Hadi Motamedi]

Thank you very much for your help. I have received plentiful helpful
messages . Please consider this case as solved.
Thank you again

On Sun, Oct 30, 2016 at 12:47 AM, Ned Slider  wrote:

> On 30/10/16 07:11, Hadi Motamedi wrote:
>
>> But the site is far remote and having alert on battery exhaustion can no
>> longer help . As I said before , I am suspicious if it comes from frequent
>> power cuts so seeking some means to distinguish it among the system logs.
>> Thank you in advance
>>
>>
>>
> Your UPS should be capable of logging to /var/log/messages and should also
> be capable of powering down the system cleanly when the battery reaches a
> predetermined critical level (either run time remaining or percentage
> charge), so there shouldn't be any uninitiated shutdowns. The UPS logs
> should tell you exactly how many power outages you are getting together
> with how long each one lasts. It sounds like you haven't configured your
> UPS.
>
>
>
>
>
>
>
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Ned Slider]

On 30/10/16 07:11, Hadi Motamedi wrote:

But the site is far remote and having alert on battery exhaustion can no
longer help . As I said before , I am suspicious if it comes from frequent
power cuts so seeking some means to distinguish it among the system logs.
Thank you in advance




Your UPS should be capable of logging to /var/log/messages and should 
also be capable of powering down the system cleanly when the battery 
reaches a predetermined critical level (either run time remaining or 
percentage charge), so there shouldn't be any uninitiated shutdowns. The 
UPS logs should tell you exactly how many power outages you are getting 
together with how long each one lasts. It sounds like you haven't 
configured your UPS.







___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Hadi Motamedi]

Thank you very much for your time . I got the point and it is a very
helpful message .
Thank you again


On Sun, Oct 30, 2016 at 12:19 AM, John R Pierce  wrote:

> On 10/30/2016 12:02 AM, Hadi Motamedi wrote:
>
>> 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 ?
>>
>
> if the power fails without warning, there will be no orderly shutdown of
> system services prior to the startup sequence
>
>
>
> --
> john r pierce, recycling bits in santa cruz
>
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[John R Pierce]

On 10/30/2016 12:02 AM, Hadi Motamedi wrote:

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 ?


if the power fails without warning, there will be no orderly shutdown of 
system services prior to the startup sequence



--
john r pierce, recycling bits in santa cruz

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Hadi Motamedi]

But the site is far remote and having alert on battery exhaustion can no
longer help . As I said before , I am suspicious if it comes from frequent
power cuts so seeking some means to distinguish it among the system logs.
Thank you in advance


On Sun, Oct 30, 2016 at 12:08 AM, Mike Mohr  wrote:

> If your battery backup can handle 2 hours of runtime then it almost
> certainly has a network management interface. Why aren't you using it to
> send alerts?
>
> On Oct 30, 2016 12:05 AM, "Hadi Motamedi"  wrote:
>
> > Thank you for your reply. You are correct and the ups is present there
> but
> > the battery charger can no longer bear power cuts more than two hours so
> I
> > need some means to distinguish frequent power cuts there among the system
> > logs.
> >
> > On Sun, Oct 30, 2016 at 12:02 AM, Eero Volotinen 
> > wrote:
> >
> > > you could use smart ups and connect information from it to system, so
> it
> > > can shutdown system in clean way.
> > >
> > > Eero
> > >
> > > 2016-10-30 7:12 GMT+02:00 Hadi Motamedi :
> > >
> > > > 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
> > > > ___
> > > > CentOS mailing list
> > > > CentOS@centos.org
> > > > https://lists.centos.org/mailman/listinfo/centos
> > > >
> > > ___
> > > CentOS mailing list
> > > CentOS@centos.org
> > > https://lists.centos.org/mailman/listinfo/centos
> > >
> > ___
> > CentOS mailing list
> > CentOS@centos.org
> > https://lists.centos.org/mailman/listinfo/centos
> >
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Mike Mohr]

If your battery backup can handle 2 hours of runtime then it almost
certainly has a network management interface. Why aren't you using it to
send alerts?

On Oct 30, 2016 12:05 AM, "Hadi Motamedi"  wrote:

> Thank you for your reply. You are correct and the ups is present there but
> the battery charger can no longer bear power cuts more than two hours so I
> need some means to distinguish frequent power cuts there among the system
> logs.
>
> On Sun, Oct 30, 2016 at 12:02 AM, Eero Volotinen 
> wrote:
>
> > you could use smart ups and connect information from it to system, so it
> > can shutdown system in clean way.
> >
> > Eero
> >
> > 2016-10-30 7:12 GMT+02:00 Hadi Motamedi :
> >
> > > 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
> > > ___
> > > CentOS mailing list
> > > CentOS@centos.org
> > > https://lists.centos.org/mailman/listinfo/centos
> > >
> > ___
> > CentOS mailing list
> > CentOS@centos.org
> > https://lists.centos.org/mailman/listinfo/centos
> >
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Hadi Motamedi]

Thank you for your reply. You are correct and the ups is present there but
the battery charger can no longer bear power cuts more than two hours so I
need some means to distinguish frequent power cuts there among the system
logs.

On Sun, Oct 30, 2016 at 12:02 AM, Eero Volotinen 
wrote:

> you could use smart ups and connect information from it to system, so it
> can shutdown system in clean way.
>
> Eero
>
> 2016-10-30 7:12 GMT+02:00 Hadi Motamedi :
>
> > 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
> > ___
> > CentOS mailing list
> > CentOS@centos.org
> > https://lists.centos.org/mailman/listinfo/centos
> >
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Hadi Motamedi]

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  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 (
> mockbu...@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
>
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[Eero Volotinen]

you could use smart ups and connect information from it to system, so it
can shutdown system in clean way.

Eero

2016-10-30 7:12 GMT+02:00 Hadi Motamedi :

> 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
> ___
> CentOS mailing list
> CentOS@centos.org
> https://lists.centos.org/mailman/listinfo/centos
>
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Power Cut

[John R Pierce]

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 
(mockbu...@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

___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos

[CentOS] Power Cut

[Hadi Motamedi]

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
___
CentOS mailing list
CentOS@centos.org
https://lists.centos.org/mailman/listinfo/centos