commandlinefu.com is the place to record those command-line gems that you return to again and again.
You can sign-in using OpenID credentials, or register a traditional username and password.
Subscribe to the feed for:
If you come from a DOS background and accidentally use DOS commands often, this and others like it can be helpful. Add to your .bash_profile, or wherever you keep such things.
get subversion diff output without distracting whitespace changes. good for when you are cleaning up code to make sure you didn't change anything important. also useful when working with old code, or someone else's code.