linux配置免登陆

配置从A机器免登陆链接到三台远程机器：B(10.169.119.148)/C(10.169.132.216)/D(10.116.116.240)

A机器：
ssh-keygen -t rsa
ssh root@10.169.119.148 "mkdir .ssh"
scp ~/.ssh/id_rsa.pub root@10.169.119.148:.ssh/id_rsa.pub
scp ~/.ssh/id_rsa.pub root@10.169.132.216:.ssh/id_rsa.pub
scp ~/.ssh/id_rsa.pub root@10.116.116.240:.ssh/id_rsa.pub

B/C/D机器：
touch /root/.ssh/authorized_keys
cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys