What Is ssh-keygen

ssh-keygen is the OpenSSH utility used to create SSH public-private key pairs for secure remote access.

By default, it generates keys in standard file locations and supports common algorithms like RSA, DSA, ECDSA, and Ed25519.

The command lets users choose the algorithm, key size, and output filename, making key generation flexible.

Careful SSH key management matters because exposed or poorly handled keys can become long-lived credentials.