One of the reasons I enjoy Linux so much, I think, is because I've always been a fan of the command line, even after the GUI came into its own. So here are a couple of articles that I've recently bookmarked showing a couple of cool Linux CLI tricks.
The first is how to look up the geographic location of an IP address from the command line, which could come in especially handy during an ARG ;)
Second is how to use Google Translate from the terminal.
Finally, here's 20 great terminal replacements for GUI applications.
Just wanted to share :)