一、在每个节点生成公钥和私钥,并拷贝

1、Hadoop100:

生成公钥和私钥

[root@hadoop100] ssh-keygen -t rsa

然后敲(三个回车)

将公钥拷贝到要免密登录的目标机器上

[root@hadoop100] ssh-copy-id hadoop100

[root@hadoop100] ssh-copy-id hadoop101

[root@hadoop100] ssh-copy-id hadoop102

2、Hadoop101:

生成公钥和私钥

[root@hadoop101] ssh-keygen -t rsa

然后敲(三个回车)

将公钥拷贝到要免密登录的目标机器上

[root@hadoop101] ssh-copy-id hadoop100

[root@hadoop101] ssh-copy-id hadoop101

[root@hadoop101] ssh-copy-id hadoop102

3、Hadoop102:

生成公钥和私钥

[root@hadoop102] ssh-keygen -t rsa

然后敲(三个回车)

将公钥拷贝到要免密登录的目标机器上

[root@hadoop102] ssh-copy-id hadoop100

[root@hadoop102] ssh-copy-id hadoop101

[root@hadoop102] ssh-copy-id hadoop102