It’s a commonly known fact that hackers can steal your passwords. And if you own some sort of server that you often SSH into, that can be a problem. Fortunately, you can use something called 2 Factor Authentication to make sure that even if hackers get your password, they still can’t get into your server. One of the best 2 factor authentication services is Google Authenticator, a secure, open-source choice. Google provides the software to integrate Google Authenticator system with your SSH server. When you log into SSH on your server, you’ll have to enter a code from the Authenticator app on your phone when you connect.