HDP Sandbox 2.6.5 ssh connectionHost key verification failed

Question

I have newly imported HDP 2.6.5 Sandbox after removing the 2.6.4, and tried to connect via ssh. My host machine Windows 10. My command:

ssh root@sandbox-hdp.hortonworks.com -p 2222

The error output:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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 RSA key sent by the remote host is
SHA256:8F0VOvcJIA2FD3Ld90kv5FiD3270onl/+uDeDBNffQ0.
Please contact your system administrator.
Add correct host key in /c/Users/user/.ssh/known_hosts to get rid of this message.
Offending RSA key in /c/Users/user/.ssh/known_hosts:3
RSA host key for [sandbox-hdp.hortonworks.com]:2222 has changed and you have requested strict checking.
Host key verification failed.

Shelton · Accepted Answer

@erkansirin78

It seems you have an issue with your known_hosts file, you need to remove the third(3) line in known_hosts file /c/Users/user/.ssh/known_hosts:3 Most likely an SSH altered the encryption keys due to a possible security hole. You can then purge that specific line from your known_hosts file:

# sed -i 377d ~/.ssh/known_hosts

but it seems your known_hosts file is mounted on the C drive on /c/Users/user/ windows 10!!

You can also remove StrictHostKey checking in your ssh configuration file, typically stored at ~/.ssh/config.

An example Host block is provided below:

Host 101
HostName yourip|hostname
User your_Userid
IdentityFile /path/to/keyfile
Port 22
StrictHostKeyChecking no

The specifically added line is the last one StrictHostKeyChecking no which does just that. Please do that and revert

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