Many years ago, I gave a presentation for the Free Software and Linux Club at Utah State University teaching people how to use SSH. Specifically, I chose to emphasize the use of the OpenSSH client. I truly believe that SSH and, in particular OpenSSH, is one of the most powerful tools available to you as a computer user (not just as a Linux user).
At the time, I had been using SSH for several years, but I had had a rough start with the tool and it took me a good while to learn all of its secrets and how to use it well. I saw the presentation as a great opportunity to give new users the opportunity to learn in just over an hour what had taken me many years to figure out.
I decided to make a little handout to go along with the presentation, to ease the audience into the concepts and to give them as reminders in case they forgot the syntax. However, I also ended up receiving feedback from seasoned users who ended up referencing my cheatsheet for some of the more obscure features.
As the years have gone by, the presentation has gotten even longer as I've learned more about SSH myself. This year, I decided to redesign my handout in Inkscape (the previous version was just a LaTeX document). I am extremely proud of how it turned out so I decided to share it here. I hope it is relevant and useful for years to come.
A printable PDF version is also available with two copies side-by-side on a piece of letter paper. You can find it here.
I have decided to distribute this under Creative Commons 4.0 BY, the least restrictive one. The cheatsheet's source and distributions are available at the following GitHub repo: https://github.com/CodeTriangle/ssh-cheatsheet.