8.04 server在安装oracle 10G遇到的问题，请帮忙

[itfit]

gcc等包都安装好了
但是在./runInstaller的时候有提示

Starting Oracle Universal Installer...

Checking installer requirements...

Checking operating system version: must be redhat-2.1, redhat-3, SuSE-9, SuSE-8 or UnitedLinux-1.0
Passed


All installer requirements met.

Preparing to launch Oracle Universal Installer from /tmp/OraInstall2009-04-14_10-15-38PM. 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 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 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


请大家帮帮忙，如何解决

[itfit]

libXtst.so.6

这是什么错误啊