This is a simple tutorial shows how to disable password authentication, and use SSH key instead for remote login to remote Ubuntu Server or Desktop.
SSH (Secure Shell) is a popular and secure way to login remote servers and/or transfer data between local and remote machines. When you try to SSH to a remote server, it usually asks for user password for authentication.
However, passwords are not the most secure. They are generally either not complex or long enough to protect from attacks, or hard to remember and type again and again on every connection.
To be more secure and also save your time, the secure key authentication is a good choice. And, here’s how to set it up step by step.
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