ユーザー追加
sudo useradd -m -g dev -s /bin/bash catatsuy
sudo usermod -p '*************************' catatsuy
パスワードのハッシュを調べる
sudo cat /etc/shadow | grep catatsuy
鍵追加
sudo mkdir -p /home/catatsuy/.ssh
sudo vim /home/catatsuy/.ssh/authorized_keys
sudo chown -R catatsuy:dev /home/catatsuy/.ssh/
sudo chmod 600 /home/catatsuy/.ssh/authorized_keys
sudo chmod 700 /home/catatsuy/.ssh/