ssh-keygen
ssh-keygen is a command-line utility included with OpenSSH for generating, managing, and converting authentication keys for SSH (Secure Shell) protocol. It creates public-private key pairs used for passwordless, secure authentication to remote servers and services. The tool supports various key types (e.g., RSA, Ed25519) and formats, enabling encrypted communication and access control.
Developers should learn ssh-keygen to implement secure, automated authentication for SSH connections, such as accessing remote servers, deploying code via CI/CD pipelines, or managing cloud infrastructure. It's essential for eliminating password-based logins, enhancing security against brute-force attacks, and enabling key-based authentication in DevOps workflows, Git operations, and containerized environments.