The problem: you have a computer sitting behind a firewall. You want to access it from a different location, but you don’t have the ability to forward any ports to it. The answer: SSH tunneling.
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Quick and Easy Passwordless public-key auth
Need passwordless auth with ssh? Need it really really fast? 3 steps and you’re done. ssh-keygen -t rsa (don’t enter a passphrase) ssh-copy-id -i ~/.ssh/id_rsa user@remotehost ssh user@remotehost Wasn’t that easy?