I noticed today when running uptime that my server has been up for exactly 365 days. Which led me to google "should I periodically reboot my server". Which led me to the knowledge that YES, I should reboot after any kernel update, or the new kernel doesn't become active. Kinda obvious I guess, but not something I knew before today. I've always kept on top of my updates, but never reboot...
...and now I'm a bit scared to.
I rebooted a different box a while ago, and it failed to come back up due to some grub conf problem. After failing to fix it from rescue mode (I had no idea what I was doing) I opted just to reinstall the box - there wasn't much on it anyway and it was trivial to do so.
Is there anything I should check (in config files etc) before I reboot that might minimise my chances of a similar failure?