Generate a keypair to be used at example.com:
$ ssh-keygen -t ed25519 -f ~/.ssh/id_ed25519_example_com -C "[email protected]"
$ ssh-keygen -t rsa -b 4096 -f ~/.ssh/id_rsa_example_com -C "[email protected]"Note: your email may or may not be on example.com.
Please add -q -N '' at the end of the shell command above if you want to
generate a key without a passphrase non-interactively.