Find out your hardware information in linux

This is very basic, but I hadn't known about it untill recently when I was given an old pc which I instantly install linux on. I don't do much when it comes to hardware as I can't really afford to... other than other peoples stuff I recycle. The quick way to find out all your hardware specs on linux is "lshw".  Turns out it had a 3.00 GHz CPU with a 512mb stick of ram and 3 open slots, which I just so happen to have 3 spare 512mb sticks laying around from other pcs I've recycled. So I ended up with a fully functional 3.00GHz CPU 2GB ram linux box, which made me more than happy... as I can't afford much.