How To Set Up Multi-Factor Authentication for SSH || How to Enable Google Authenticator for SSH.

Google two-factor authentication in SSH for Linux Server to Improve Security. An authentication factor is a single piece of information used to prove you have the right to perform an action, like logging into a system. An authentication channel is a way an authentication system delivers a factor to the user or requires the user to reply. Passwords and security tokens are examples of authentication factors; computers and phones are examples of channels.

Multi-factor authentication (MFA) requires more than one factor in order to authenticate or log in. This means a bad actor would have to compromise multiple things, like both your computer and your phone, to get in. The different type of factors is often summarized as:

1. Something you know, like a password or security question
2. Something you have, like an authenticator app or security token
3. Something you are, like your fingerprint or voice

Read the full article "How do I set up Google Authenticator on my server?

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