Oracle Universal Installer.. failed to install

Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 39602 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/x                                                                                                                     dpyinfo. Check if the DISPLAY variable is set.    Failed <<<<

Some requirement checks failed. You must fulfill these requirements before

continuing with the installation,

Continue? (y/n) [n] y

>>> Ignoring required pre-requisite failures. Continuing...

Preparing to launch Oracle Universal Installer from /tmp/OraInstall2013-06-25_11                                                                                                                     -31-25AM. Please wait ...

DISPLAY not set. Please set the DISPLAY and try again.

Depending on the Unix Shell, you can use one of the following commands as exampl                                                                                                                     es to set the DISPLAY environment variable:

- For csh:                      % setenv DISPLAY 192.168.1.128:0.0

- For sh, ksh and bash:         $ DISPLAY=192.168.1.128:0.0; export DISPLAY

Use the following command to see what shell is being used:

        echo $SHELL

Use the following command to view the current DISPLAY environment variable setti                                                                                                                     ng:

        echo $DISPLAY

- Make sure that client users are authorized to connect to the X Server.

To enable client users to access the X Server, open an xterm, dtterm or xconsole                                                                                                                      as the user that started the session and type the following command:

% xhost +

To test that the DISPLAY environment variable is set correctly, run a X11 based                                                                                                                      program that comes with the native operating system such as 'xclock':

        % <full path to xclock.. see below>

If you are not able to run xclock successfully, please refer to your PC-X Server                                                                                                                      or OS vendor for further assistance.

Typical path for xclock: /usr/X11R6/bin/xclock