I am trying to install Oracle database 11g in my Red Hat 6.4 and the installer aborts with a warning followed by an error message:
Warning ">>> Could not execute auto check for display colors using command /usr/bin/xdpyinfo. Check if the DISPLAY variable is set. Failed <<<
"
Error mesage: "Exception in thread "main" java.lang.INternalError: Can't connect to X11 window server using ':0.0' as the valeu of the DISPLAY variable
"
I checked the DISPLAY variable and its value is ":0.0". I run /usr/bin/xdpyinfo and it does not work. It returns:
No protocol specified
xdpyinfo: unable to open display ":0.0".
This problem occurs only with 'oracle' user.
I am in a Virtual Box machine.