WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
xx:xx:xx:xx:xx:xx.
Please contact your system administrator.
Add correct host key in /home/user/.ssh/known_hosts to get rid of this message.
Offending key in /home/user/.ssh/known_hosts:4
RSA host key for domain.com has changed and you have requested strict checking.
Host key verification failed.

ssh-keygen -R domain.com

Linux下创建最低权限的SSH账号

如果你自己有一台 Linux 服务器,那么单纯用来做 Server 岂不是有点浪费了,下边的命令可以让你方便的创建一个安全的Tunnelier 专用SSH账号。

#添加用户
useradd -M -s /sbin/nologin -n username
#修改密码
passwd username
#删除用户
userdel -r username