ssh無密碼登錄

生成密鑰並複製

ssh-keygen -t rsa -P ''
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys

修改SSH配置文件

更改/etc/ssh/sshd_config中的

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile	.ssh/authorized_keys

將KEY拷貝到DATANODE機器並複製

scp ~/.ssh/id_rsa.pub xxx@192.168.2.110:~/.ssh/
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys 再以和NAMENODE機器中的一樣的方式修改DATANODE機器中的SSHD_CONFIG