Siege by Joe Dog Software is a great utility for quickly getting some useful data about the load handling capabilities of almost any web application.
Once you secure MySQL you should be sure to always follow a simple rule: Create a new account for every database you deploy. It’s a bit annoying to remember this command and I always come back to it.
I always forget this one. Sometimes you want to tar or untar something while maintaining file permissions. Actually not sometimes, all the fucking time.