ssh keygen
$ ssh-keygen -t rsa -b 4096 -C "[email protected]"
ssh-keygen -t rsa -C [email protected]
ssh-keygen -t rsa -C "[email protected]"
$ ssh-keygen -t rsa -b 4096 -C "[email protected]"
ssh-keygen -t rsa -C [email protected]
ssh-keygen -t rsa -C "[email protected]"