启动hadoop集群报错The authenticity of host 'master (172.16.22.41)' can't be established. ECDSA key fingerp

解决办法：

找到/etv/ssh/ssh_config

在最后添加：

StrictHostKeyChecking no

UserKnownHostsFile /dev/null

或者：ssh  -o StrictHostKeyChecking=no  192.168.0.xxx

内网中非常信任的服务器之间的ssh连接