It's just amazing how many people fail to realize the power of google. Google even has it's own special linux area.
Whenever I need help, and I don't know it off the top of my head, it's google to the rescue. I am not ashamed to admit that at all. If I can't find it on google, I will then post in a forum or ask my colleagues for help. I am also not ashamed to do that either. It's impossible for any of us to know and retain everything.