When setting up 19c GI by running “gridSetup.sh”, the following errors occur:
$ ./gridSetup.sh
ERROR: Unable to verify the graphical display setup. This application requires X display. Make sure that xdpyinfo exist under PATH variable.
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
SOLUTION
Enable X11forwarding in /etc/ssh/sshd_config.
# ls -ltr /etc/ssh/sshd_config
-rw——-. 1 root root 4131 Apr 4 2023 /etc/ssh/sshd_config
# vi /etc/ssh/sshd_config
X11Forwarding yes
# systemctl restart sshd