配置ssh互信操作步骤：

1.生成公钥

[root@hadoop000 ~]# rm -rf ~/.ssh[root@hadoop000 ~]# ssh-keygen[root@hadoop001 ~]# rm -rf ~/.ssh[root@hadoop001 ~]# ssh-keygen

2.选择第一台作为先完善的机器

[root@hadoop000 .ssh]# cat id_rsa.pub >> authorized_keys将本机公钥输出到authorized_keys中

3.其他机器将id_rsa.pub发送给第一台

[root@hadoop001 .ssh]# scp id_rsa.pub  192.168.137.251:/root/.ssh/id_rsa.pub.hadoop001

4.将其他机器的id_rsa.pub追加到authorized_keys

[root@hadoop000 .ssh]# cat id_rsa.pub.hadoop001 >> authorized_keys

5.然后将该authorized_keys分发

[root@hadoop000 .ssh]# scp authorized_keys 192.168.137.141:/root/.ssh/

每台机器第一次ssh跳转其他机器都需输入yes 目的 --> known_hosts