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→SSH Keys
Using the magic of public key cryptography you can SSH to a linux machine without using a password. This topic is crucial - not only for this course but in the industry, SSH keys are used everywhere that linux servers are used.
Here's a modified diagram from [http://sebastien.saunier.me/blog/2015/05/10/github-public-key-authentication.html Sébastien Saunier's blog] that's a simple illustration of how SSH key authentication works (the one in the blog post had a significant error in itwhich I fixed in the version here):
[[Image:ssh_connection_explained.png|800px]]