Could not execute auto check for display colors

            Could not execute auto check for display colors using command / 

                                Check if the DISPLAY variable is set

Error:

Checking Temp space: must be greater than 500 MB.   Actual 74963 MB    Passed

Checking swap space: must be greater than 150 MB.   Actual 23830 MB    Passed

Checking monitor: must be configured to display at least 256 colors

    >>> Could not execute auto check for display colors using command /usr/bin/xdpyinfo. Check if the DISPLAY variable is set.    Failed <<<<

Sol:

1) log into console as root
2) DISPLAY=:0.0
3) export DISPLAY
4) xhost +
5) su - oracle
6) DISPLAY=:0.0
7) export DISPLAY

Now try to run the installer in VNC, it will work