When I upgrade the kernal and reboot there is a screen that lists the kernals on my machine, the top one being the new one. Should I delete the other kernels? If so how do I do this?
You can see your currently installed kernel(s) with:
rpm -q kernel
This will list one or more kernels, for exmaple:
kernel-2.4.19-8.9 kernel-2.4.20-19.9
So if you are now running 2.4.20 after an update, and you want to remove the older 2.4.19, just run the following as root:
rpm -e kernel-2.4.19-8.9
It is important to specify the version and build numbers fully, so that you remove the older kernel, instead of the current one.
Some people might tell you that you should keep at least one older kernel on the system, in case something is wrong with you current one, and you need the older one to fall back on. In my personal experience though, I've never had trouble with a newer kernel from RedHat, so I usually remove the older kernels and only keep one on my system.
-- Anand Buddhdev
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