1.修改host
vim /etc/hosts
192.168.1.70 slave
192.168.1.106 master
2.master免密登陆slave
master将公钥发送到slave：
scp ~/.ssh/authorized_keys slave:~/
slave将授权登陆
mv authorized_keys ~/.ssh
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 0600 ~/.ssh/authorized_keys
原文：https://www.cnblogs.com/liguochun/p/9483898.html