ssh 免密码登录root用户

1 每台虚拟机分别执行 ssh-keygen -t rsa 2 将从机公钥追加到主机上 ssh-copy-id -i ~/.ssh/id_rsa.pub hadoop 3 主机执行 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys 3 复制到所有从机 scp ~/.ssh/authorized_keys [email protected]:~/.ssh

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