X11 connection rejected because of wrong authentication.

This is a nice one, while you’re configuring the ssh port forwarding to get your display from the source server onto destination server using SUDO. In case you don’t know the oracle user’s password on the destination server, but you have sudo privilege, you’re going to do something like this: On the source: Change the…

X11 forwarding request failed on channel 0

I got this error while trying to redirect my display to the local host. marius$ ssh -X oracle@rac1 Warning: the ECDSA host key for ‘rac1’ differs from the key for the IP address ‘192.168.100.101’ Offending key for IP in /Users/marius/.ssh/known_hosts:10 Matching host key in /Users/marius/.ssh/known_hosts:13 Are you sure you want to continue connecting (yes/no)? yes…