Ubuntu Server 12.04 spontaneous random reboot? nothing in log!

[Colin Law]

On 17 February 2014 18:18, Keith <keith.w_65 at centurylink.net> wrote:
> [posted to "Ubuntu user technical support, not for general discussions"
> <ubuntu-users.lists.ubuntu.com> & emailed]
> On Mon, 17 Feb 2014 22:33:46 +0500, Muhammad Umair
> <muhammaduma1r at hotmail.com> wrote:
>
>
>> We have a few Ubuntu servers running in our lab, on some of which we have
>> experienced random reboots. A reboot may happen with a gap of a few days,
>> or may not occur at all. On one machine for example the exact reboot time
>> was "Wed Feb 12 12:56 EST".
>
> You need to do a memtest to see if you have faulty memory. When a computer
> spontaneity reboots that indicates a hardware failure. So if it's not a
> memory defect then you will have to take it to a computer tech.

Other common causes are power supply or temperature problems.  If it
reboots when running memtest (which you may have to leave running for
days) then it is likely a hardware problem.

Colin