hadoop 免密码登陆

生成公钥 私钥

ssh-keygen -t  rsa

运行完毕后查看

生成的私钥
/root/.ssh/id_rsa

生成的公钥
/root/.ssh/id_rsa.pub

将公钥传送给其他主机
ssh-copy-id -i /root/.ssh/id_rsa.pub [user@]machine