Fundamentals of Mercurial: the version control software

This two are the most important references to Mercurial, the easy to setup version control system

http://hginit.com/index.html
This tutorial will explain you the fundamental ideas. Just pay attention that
hg commit -m "MESSAGGE"-u USERNAME

A lot of resources are available here!
http://mercurial.selenic.com/wiki/Mercurial


This is the workflow, to use when working with other people (from http://hginit.com/index.html)

1. If you haven’t done so in a while, get the latest version that everyone else is working off of:
• hg pull
• hg up
2. Make some changes
3. Commit them (locally)
4. Repeat steps 2-3 until you’ve got some nice code that you’re willing to inflict on everyone else
5. When you’re ready to share:
• hg pull to get everyone else’s changes (if there are any)
• hg merge to merge them into yours
• test! to make sure the merge didn’t screw anything up
• hg commit (the merge)
• hg push