This recipe teaches you how to generate a key pair and set up key-based authentication for SSH sessions, allowing you to secretly connect to a remote system without using a password. Key-based authentication is considered more secure than using a password because a weak password can be easy to guess and a strong password can be easy to forget and more likely to be written down. In either case, an attacker has a fairly good chance of discovering a user's password. With key-based authentication, a user must supply the correct private key file, which is practically impossible to crack or spoof.
This recipe requires a remote system running the OpenSSH server and a local computer with the OpenSSH SSH client installed. Its examples assume that the remote system is configured with the IP address 192.168.56.100. Also, you will need an available user account on the remote system.