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.

Learn how to enable passwordless SSH authentication on both Linux and macOS. Image: Getty Images/iStockphoto You probably secure shell into your Linux servers throughout the day.

Here's a very quick example of how to setup GitHub SSH keys and use them to perform Git clone, push and pull commands over a securely configured SSH connection.