Establishing an encrypted connection to your online server is very smart. Especially if you are doing administrative tasks. This article does not prevent users from abusing the sshd service running on your linux box, but by changing the default port you prevent scripts from attacking on it.
So the other week I have been working on my dedicated box, just to make it a bit easier to work with in the future. One of the things I was trying to understand and learn was yum update and bash scripting. So why not combine the two? Right.. This blog entry is the result, hopefully also of some use to others.
Bigger PHP applications, such as vBulletin can gain a lot of increased performance from running a PHP op-code cache/accelerator such as APC.
Here are some instructions on how install APC on various systems, my personal experience is with what appears the most common: 32bit CentOS 5 Server.