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How to Setup Two-Factor Authentication (Google Authenticator) for SSH Logins

By default, SSH already uses a secure data communication between remote machines, but if you want to add some extra security layer to your SSH connections, you can add a Google Authenticator (two-factor authentication ) module that allows you to enter a random one-time password (TOTP ) verification code while connecting to SSH servers.

Originally Published at How to Setup Two-Factor Authentication (Google Authenticator) for SSH Logins