Saving more than two kernels

[Les Mikesell]

Kam Leo wrote:

>> >>> In /etc/yum/pluginconf.d/installonlyn.conf. change
>> >>> tokeep=2 to tokeep=5.
>> >> Unless some one can tell us which service to restart the
>> >> only way I know of for this to take hold and actually work
>> >> is to reboot the system.
>> >
>> > There is no service.  This file is read by yum every time it is 
>> run.  If
>> > you change it, the next time you run yum, it should pick up the new
>> > value.  I routinely change this from 2 to 5 on all of my machines.
>>
>> Have you ever actually needed to go back to something earlier than the
>> kernel you were running when the update picked up the next one?
>>
> 
> Yes, kernel-2.6.19-1.2895.fc6 broke PS/2 mouse functionality on some
> systems, one of which belonged to me. It took an additional three
> updates before an updated kernel was released which fixed the problem
> on my system. To date some users report their PS/2 mouse is still
> broken.

But at least on my FC5 system set to keep 2 kernels, it kept the one I 
was running and the new one being installed.  There were many that would 
not boot, but they were replaced each time instead of the older one that 
I kept having to choose to boot.

> Since FC5 I have made it a practice of setting "tokeep" to 5. I do not
> maintain 5 kernels, but I keep the threshold at 5 for events such as
> the one above.

Another response mentioned a situation where a kernel ran well enough to 
  install the next broken one, but a problem was noticed later. In that 
scenario you would need more than two.

-- 
   Les Mikesell
    lesmikesell at gmail.com