###user作成/パスワード設定
useradd xxx
passwd xxx
###sudersに追加
vi /etc/sudoers
%xxx ALL=(ALL) NOPASSWD: ALL
###公開鍵認証設定
###パスワードログインオフ
vi /etc/ssh/sshd_config
PasswordAuthentication no
PermitRootLogin no
systemctl restart sshd
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