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SSH with Public Key-Based Authentication

To improve the system security and to enable running automated maintenance tasks on other machines, you can use the key-based authentication instead of standard password authentication.

Key-based authentication uses two keys, one “public” key that anyone is allowed to see, and another “private” key that only the owner is allowed to see.

To securely communicate using key-based authentication, you need to create a public key for the computer you’re logging in from, and securely transmit it to the computer you’re logging in to.