An SSH key is a secure way to log in to remote computers and servers without typing a password each time. It uses a matched pair of keys, one public and one private.
How SSH Keys Work
You place the public key on the server you want to access. Your private key stays on your own device. When you connect, the server checks that your private key matches, then lets you in.
Why Use SSH Keys Instead of Passwords
They are much harder to guess or steal than passwords. They also remove the need to type credentials repeatedly and work well for automation.
How to Generate an SSH Key
Open your terminal or command-line tool and run the key generation tool built into most systems. Choose a modern key type, such as Ed25519, when asked. Accept the default save location, then create a strong passphrase for extra protection. The tool produces two files: one marked public and one private.
Adding the Key to a Server or Service
Copy the contents of the public key file and paste it into your server’s authorized keys or your hosting service’s settings page.
Keeping It Safe
Never share your private key, protect it with a passphrase, and back it up securely. Remove old keys you no longer use.
Final Thoughts
SSH keys offer stronger security and greater convenience. Generate one today, and enjoy safer remote access.