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1、要把test100、test99、test98三台的主机名和IP对应关系加到hosts文件
vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.61.30 test100
192.168.80.11 test99
192.168.80.10 test98
2.在每台集群上面执行(以 test100、 test99、 test98三台为例):
#ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
3.选择一台机器,假定是 test100
#cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
#ssh test98 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
#ssh test99 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
将集群中所有的公钥复制到一台机器上
4. 将所有的公钥复制到集群其他机器
#scp ~/.ssh/authorized_keys test98:/root/.ssh
#scp ~/.ssh/authorized_keys test99:/root/.ssh
5.测试
通过ssh测试