ECDSA host key for 120.2*.***.** has changed and you have requested strict checking.

在阿里云上购买的新的实例并且安装centOS，用ssh连接后出现错误

 

remove with:
ssh-keygen -f "/root/.ssh/known_hosts" -R 120.2*.***.**
ECDSA host key for 120.2*.***.** has changed and you have requested strict checking.

则需要在自己的终端删除公钥

rm -rf ~/.ssh/known_hosts

删除公钥后重新连接成功！