Tullup Blog

Field Notes

Concrete writing on how AI systems get built and run in production. No generalities, no “definitive guides” — just what actually works.

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·8 min read·fundamentals

What is SSH and how do I actually use it

A plain-English field guide to SSH for people who've copied the command a hundred times and never had it explained. What the letters mean, why a keypair is more secure than a password, and the handful of commands you'll actually run when you log into an EC2.

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