Host Key Verification Failed

• http://askubuntu.com/questions/45679/ssh-connection-problem-with-host-key-verification-failed-error
• # ssh-keygen -R hostname

X2Go: Access Denied. Authentication that can continue…

• https://www.howtoforge.com/community/threads/x2go-on-ubuntu-tutorial-not-connecting.67156/
• Access denied. Authentication that can continue: publickey,gssapi-keyex,gssapi-with-mic,password,keyboard-interactive
• Go -> Connect to Folder -> ./ssh/
• Remove server entry from known_hosts