how do I boot people from my server?

If you have the op (@), then you can type /kick [username] [description].

Username= Player's name
Description= You can type something to them.

Example:

Xdag is giving you trouble and you want to kick him. You type /kick Xdag You're annoying.

Huh? They have descriptions too?

You can right and left click the persons name, which brings up the CP.

You have all the options then.

Question answered, which leads to thread closing.

Thank you Huck and itachi88.