Here's a nice collection of Ruby one-liners. Having a few of these formulas at hand, may save you lots of work...

Creating a remote git repo

Assuming you have a project in your local machine and console access to a remote server (and git installed on both), these instructions will accomplish the following:

1. turn your local copy into a git repository
2. push it to the remote server

Examples of tar usage

Fastest way I know to get help on the tar utility, in this post.

Root user in mac os

The unix-style root user is disabled by default in mac os X.
Should you need to activate it, follow these instructions.