Aww man, forget all that apt-crap headache. Ubuntu is Linux for human beings! All you gotta do is type

Aww man, forget all that apt-crap headache. Ubuntu is Linux for human beings! All you gotta do is type
sudo taskel
You'll be prompted for your password, then given a list of all kinds of server configurations. Pick LAMP and hit next. It will install everything for you.
Ah thank you.