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mlhjr10
2nd June 2007, 01:36 AM
Hi all,

when I do a yum update, and see a new kernel, and choose to install it, do I need to reboot my box?

if so,, how do you guys install new kernels on production machines?

Thanks for the feed back in advance.. :D


Mo

William Haller
2nd June 2007, 01:46 AM
Yes. A kernel upgrade requires a reboot. Doesn't matter if it is test or production - you still get to do a reboot. You need to decide if the kernel security patches or driver updates are needed or could affect you. If you need them, you will have to reboot when done. If not, you can wait till a kernel comes along with new features you need.

You can do the actual update while the system is live - it will be installed parallel to the old kernel(s) one of which will be running. When you get to a non-peak time of the day or day of the week, reboot. Don't remove the old kernels until you are sure the new kernel works.

If you are running a production server, you should have an identically configured box that you can use to make sure the kernel plays with the software and hardware without issues before doing that final reboot.