No supported authentication methods available (server sent: publickkey,gssapi-keyex,gssapi-with-mic)

This document describes how to resolve the subject lined issue.

We are getting this issue while logging in to putty session with private key because SSH-Key format is mismatch. 

Error:

Solution: We have to convert the SSH-Key to .ppk format and use it to overcome this issue.

Please click here how to convert the SSH-Key to .ppk format.

Thanks for going through the post.............