copy_ssh_keys() {
  cat ~/.ssh/authorized_keys | ssh $* '(test -f ~/.ssh/id_rsa || ssh-keygen -t rsa -b 4096 -f ~/.ssh/id_rsa -N "") </dev/null && cat > ~/.ssh/authorized_keys'
  echo -n "Testing..."
  ssh -o PasswordAuthentication=no $* 'echo Success'
}