Linux服务器配置ssh免秘钥

1.ip与hostname绑定
    vi /etc/hosts
    192.168.18.111    h1
    192.168.18.112  h2
    192.168.18.113  h3

2.免秘钥配置

[hadoop@h1 ~]$ ssh-keygen -t rsa
[hadoop@h2 ~]$ ssh-keygen -t rsa
[hadoop@h3 ~]$ ssh-keygen -t rsa

[hadoop@h1 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h1
[hadoop@h1 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h2
[hadoop@h1 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h3

[hadoop@h2 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h1
[hadoop@h2 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h2
[hadoop@h2 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h3

[hadoop@h3 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h1
[hadoop@h3 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h2
[hadoop@h3 ~]$ ssh-copy-id -i /home/hadoop/.ssh/id_rsa.pub h3