Oracle DB 10gR2 Installation

I try to install th a oracle 10gR2 database to a SuSe Linux 11.4.

I try to install to tha local machine, not to a remote host. But when I start the installation every time I get the next error message:

CODECan't connect to X11 window server using '' as the value of the DISPLAY variable.

Unable to start an interactive install session because of the following error:Can't connect to X11 window server using '' as the value of the DISPLAY variable. The DISPLAY environment variable should be set to <hostname or IP address>:<screen>, where the <screen> is usually '0.0'.

Depending on the Unix Shell, you can use one of the following commands as examples 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 setting:
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 basedprogram 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': ''

I think that I don't need the x server when I install the product to the local machine. But every time I get this message.