Infrastructure Software

Hi all,

I am working on mac and i have installed virtual machine and also installed the oracle linux.
I have done all the preparation for installing oracle (creating group, user, parameters configuration).
When i try to run the runInstaller it gives me this error:

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 <<<<

Instead of this i continued with the installation but very next second i got this error:

oracle@localhost database$ Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Exception in thread "main" java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.access$000(X11GraphicsEnvironment.java:53)
at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:142)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
at java.awt.Window.init(Window.java:270)
at java.awt.Window.<init>(Window.java:318)
at java.awt.Frame.<init>(Frame.java:419)
at oracle.ewt.popup.PopupFrame.<init>(Unknown Source)
at oracle.ewt.lwAWT.BufferedFrame.<init>(Unknown Source)
at oracle.sysman.oio.oioc.OiocOneClickInstaller.<init>(OiocOneClickInstaller.java:328)
at oracle.sysman.oio.oioc.OiocOneClickInstaller.<clinit>(OiocOneClickInstaller.java:168)

I try as root also but i am getting same error.
I am new to linux so i really dont know what this means and how to solve this on Oracle Linux.
All the package required for oracle are installed.

Kindly help.
Regards,
Shane