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add SSH ProxyCommand/ProxyJump advice #21
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First, my <3 for creating this website/lessons! I've been recommending it for years, especially for "scientific computing" users who often didn't even have a "CS education" but are now developing software and running in Unix environments.
SSH is very unintuitive, so the explanation of keys, & port-forwarding is extremely valuable. I've added here a section on how to do "SSH Proxying" because that's another common use case. From their perspective "my data is on host B behind SSH server A, and I want to download (upload) it" is extremely common.
Hopefully this repo/class is still being loved and can be updated!
This PR was originally from a fork: nyetsche/missing-semester (branch:
ssh-proxy)