11:40:03 + ssh -o StrictHostKeyChecking=no root@192.168.xx.146 'mkdir -p /root/dev/backup'
11:40:03 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
11:40:03 @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
11:40:03 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
11:40:03 IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
11:40:03 Someone could be eavesdropping on you right now (man-in-the-middle attack)!
11:40:03 It is also possible that the RSA host key has just been changed.
11:40:03 The fingerprint for the RSA key sent by the remote host is
11:40:03 7d:ef:cf:1b:b8:31:c2:3c:76:82:0a:dd:54:b5:b6:05.
11:40:03 Please contact your system administrator.
11:40:03 Add correct host key in /home/user/.ssh/known_hosts to get rid of this message.
11:40:03 Offending key in /home/user/.ssh/known_hosts:8
11:40:03 Password authentication is disabled to avoid man-in-the-middle attacks.
11:40:03 Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.

方法一：进入/home/user/.ssh/known_hosts 把对应的ip的rsa删除即可

方法二： 

执行如下命令，重新生成ssh-rsa

ssh-keygen -R 192.168.xxx.146