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Git is a command line version control tool that we use in development so that multiple people can work on one file at a time without stomping all over each other's changes. I would strongly recommend reading though the quick git intro I used in college before continuing down this page; I found it really helpful when I was first learning, and it'll help provide a lot of context for what comes next!.
The Ubuntu command line tutorial could also be of interest if you're not familiar with using the command line interface.
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GitHub
While production versions of operations software live in ~/opsTools, they also remotely live on GitHub, in the SLAC GitHub organization called SLAC Lab. Access to it isn't granted automatically, but it's pretty easy to get! Make a GitHub account (or use one that you already have) and send your username to Brian Van Klaveren (email bvan@slac.stanford.edu or ping brianv on Slack) asking for access. Note: This step has very high potential to end up out of date if someone else ends up managing SLAC Lab, so keep that in mind.
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