recently started crashing 4 am

John Summerfield debian at
Tue Nov 27 07:46:14 UTC 2007

Ed Greshko wrote:
> Mail List wrote:
>>     Anyone know what be causing what appears to be something in cron (4 am or 
>> so) freezing the machine - started happening the last week or so after some 
>> bout of updates - including kde 3.5.8.
>>      After kde update I had to diable knetwork manager which made the machine 
>> interminably slow for user to login - removing it fixed that problem - nm is 
>> not runnning.
>>        Now it is freezing around 4 am .. any ideas what may be causing this ? 
>> Its been a happy F7 machine for a long time prior to this ?
>>       I could not find any interesting info in log files. Box is not visible 
>> to internet either.
>>       Thanks for any pointers ... 
> No idea....
> However, for troubleshooting you can try at least one of two approaches...
> First, determine what cron jobs are being at run 4AM and then do one
> (potentially both) of the following.

Daily housekeeping.
> 1.  Run the jobs manually one at a time.
> 2.  Disable all the jobs from running except one and then enable one per day
> until you have problems.

Run half. You eliminate one half immediately.

Enable to okay part, and half the other. Repeat until done.

This is why I do not do automatic updates, ever. I've been saying since 
RHN was introduced, back around Valhalla's time, it was a bad idea. 
Automatic downloading is good. I like to see what changes, and what's 
proposed to change. Even security fixes aren't necessarily urgent.



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