What is SSH? What is SSH Agent

We can use encrypted password for SSH authentication but it is not convenient and subject to brutal-force password guessing attack.
So,  we use public key authentication mechanism
Generate SSH key pair - public and private key (ssh-keygen)
Enter passphrase to protect private key
Copy private key to ~/.ssh/identity, mode 0600
Copy public key to the remote machine in ~/.ssh/authorized_keys
However, we still [...]

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