How often do you have to set up a new host and copy over your SSH public key for later access? It’s annoying, can involve copy and pasting or arcane pipes to get it done. Turns out, built into OpenSSH there’s a much easier way called ssh-copy-id:

ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected]

This will let you log into a target.system, specify a local public key, and add it to the authorized_keys all in one step. Nice, simple, and effective.