SSH远程登录出现 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! 解决办法

ssh-keygen -f "/root/.ssh/known_hosts" -R 172.21.136.107

ssh username@172.21.136.107

 

if 出现 permission denied please try again. ssh

要修改root的ssh权限，即修改 /etc/ssh/sshd_config文件中 
PermitRootLogin without-password 
改为 PermitRootLogin yes         

并在该行下，添加  AllowUsers root username