Version control
Version control is one of the most helpful and time-saving tools that can be used in support of software development. Even if you're only making small changes to the templates you're using, or adding modules without modifying the code inside of them, version control allows you to track changes that have been made and to evaluate code at any given point in time after the implementation. Even more importantly, it allows you to roll back the code to an earlier state, in cases where you're not quite sure what changes might have caused problems with the site.
At this point, the tool most widely used for version control by the development community is Git. Git is a system that was developed by Linus Torvalds (the originator of LINUX himself!) as a result of his frustration with existing tools. While it's beyond the scope of this book to go into much detail around what exactly it was that frustrated him, suffice to say that the changes he's made have positioned Git as the lingua...
