ssh-keygen -t

• ssh-keygen -t ed25519 (There is no need to set the key size, as all ed25519 keys are 256 bits) other options:

[-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]

Related

• ssh-keygen -t rsa
• ssh-keygen -t dsa

See also

• ssh-keygen [ -R, -t | -p | -i | -y | -f | ~/.ssh/id_rsa | --help ] ~/.ssh/known_hosts