generate ssh key paitr
$ ssh-keygen -t rsa -b 4096 -C "[email protected]"
ssh-keygen -t rsa -C "[email protected]"
$ ssh-keygen -t ed25519 -C "[email protected]"
$ ssh-keygen -t rsa -b 4096 -C "[email protected]"
ssh-keygen -t rsa -C "[email protected]"
$ ssh-keygen -t ed25519 -C "[email protected]"