Error:
[centos@s200 hadoop]$ ssh localhost The authenticity of host ‘localhost (::1)’ can’t be established. ECDSA key fingerprint is b7:a7:1d:80:34:67:c6:1e:a2:ac:8e:67:a5:38:38:d0. Are you sure you want to continue connecting (yes/no)? 1 Please type ‘yes’ or ‘no’: yes Warning: Permanently added ‘localhost’ (ECDSA) to the list of known hosts. Write failed: Broken pipe
Fix it:
ssh -o StrictHostKeyChecking=no 192.168.xxx.xxx
方法二
一个彻底去掉这个提示的方法是，修改/etc/ssh/ssh_config文件（或$HOME/.ssh/config）中的配置，添加如下两行配置：
StrictHostKeyChecking no
UserKnownHostsFile /dev/null
修改好配置后，重新启动sshd服务即可。
centos7重启ssh服务命令为systemctl restart sshd.service
