I'm trying to ssh into my UBUNTU through my PC with Cygwin on it. I can WINSCP without a hitch, however when I ssh through a command line it comes up with this error:
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@ 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 a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
5d:84:de:4e:a8:81:df:22:06:23:98:34:cd:26:f5:1a.
Please contact your system administrator.
Add correct host key in /home/Trevor/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/DIRECTORY
ECDSA host key for HOSTNAME has changed and you have requested strict checking.
Host key verification failed.
So I looked it up and it said that I needed to change my host key in my .ssh folder that's located in my home folder. Well, there wasn't one so I made one. Tried again and got the same error.
What to do?
Answer
"Host key verification failed" means that the host key of the remote host was changed.
Ssh stores the host keys of the remote hosts in ~/.ssh/known_hosts. You can either edit that text file manually and remove the old key (you can see the line number in the error message), or use
ssh-keygen -R hostname