SSH login without password
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for root user
- [root@A ~]vi /etc/hosts
#[IP address] [hostname]
192.168.1.X A
192.168.1.Y B
- generate authentication keys and distribute
[root@A ~]# ssh-keygen -t rsa
[root@A ~]# cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys
[root@A ~]# scp ~/.ssh/* root@B:~/.ssh/
- check
[root@A ~]# ssh B
[root@A ~]# ssh A
for non-root users
- just like what has to do for root user
配置ssh
(0) 先用root检查ssh的配置文件,确保
[root@hadoop01 ~]# vi /etc/ssh/sshd_config
保持以下配置
PasswordAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
[root@hadoop01 ~]# service sshd restart
(0) 先用root检查ssh的配置文件,确保
[root@hadoop01 ~]# vi /etc/ssh/sshd_config
保持以下配置
PasswordAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys
[root@hadoop01 ~]# service sshd restart
(1)在master上面生产密钥和明钥
[hadoop@hadoop01 ~]$ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
[hadoop@hadoop01 ~]$ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
[hadoop@hadoop02 ~]$ chmod 644 .ssh/authorized_keys //非常关键
(2)在slave上面创建.ssh目录,并从master上拷贝明钥到slave上的.ssh目录
[hadoop@hadoop02 ~]$ mkdir .ssh
[hadoop@hadoop02 ~]$ chmod 700 .ssh //非常关键
[hadoop@hadoop01 ~]$ scp .ssh/authorized_keys hadoop02:/home/hadoop/.ssh/
要输入hadoop用户在hadoop02上的密码
(3) 测试
由master向slave发起ssh连接
[hadoop@hadoop01 ~]$ ssh hadoop02 //无须密码了
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