Even if you log out or reboot that client machine, you still won’t have to type your passphrase for SSH key authentication to that Ubuntu Server.

To set up SSH key authentication, you'll need at least two Linux machines, one you log in to and one you log in from. I'll demonstrate with Pop!_OS as my desktop and Ubuntu Server as my remote server.

Jack Wallen shows you how to set up both two-factor authentication and SSH key authentication for a rock-solid remote login of your Linux servers.

So I am finally returning to linux after a bit of a hiatus. I have installed Ubuntu 7.10 on my laptop and I am absolutely AMAZED with how easy to set-up and use it is. Truly plug-and-play.Anyway ...