¿Qué comando genera un par de claves RSA de 2048 bits en ~/.ssh/id_rsa con una frase de contraseña vacía?
~/.ssh/id_rsa
ssh-keygen -t rsa -b 2048 -N "" -f ~/.ssh/authorized_keys
ssh-keygen -t rsa -b 2048 -N ~/.ssh/id_rsa
ssh -t rsa -b 2048 -N "" ~/.ssh/id_rsa
ssh-keygen -t rsa -b 2048 -N "" -f ~/.ssh/id_rsa