SSH 免密码登陆到多台机器

场景：

需要从主机1.100免密码多了到1.115及1.116

实现：

登陆1.100

$ cd ~/.ssh/

$ ssh-keygen -t rsa　　然后三个回车

会有两个文件产生，id_rsa 私钥 id_rsa.pub 公钥

$ scp id_rsa.pub user1@1.115:~/.ssh/

$scp id_ras.pub user2@1.116:~/.ssh/

user1登陆1.115

$ cd ~/.ssh

$ cat id_rsa.pub >> authorized_keys

user2登陆1.116

$ cd ~/.ssh

$ cat id_rsa.pub >> authorized_keys

再登陆1.100 尝试是否成功

ssh user1@1.115

ssh user2@1.116