2.配置/etc/hosts,确认机群中每台机器都有三个相同的文件/etc/hosts
3.编辑/etc/securetty 文件 添加 rsh rexec rlogin 三个服务
4.编辑/etc/xinetd.d/rexec 、rlogin 、rsh 三个服务,将“ disable = YES ”改成“ disable = NO ”,
5.重启服务 service xinetd restart
mkdir ~/.ssh
chmod 700 ~/.ssh
ssh-keygen -t rsa
ssh-keygen -t dsa
然后,在节点 dbtest1 执行以下命令
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
ssh dbtest2 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
ssh dbtest2 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
scp ~/.ssh/authorized_keys dbtest2:~/.ssh/authorized_keys