$ ./runInstaller 

Starting Oracle Universal Installer...

Checking Temp space: must be greater than 120 MB.   Actual 16652 MB    Passed

Checking swap space: must be greater than 150 MB.   Actual 8191 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 Ded <<<<

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/OraInstall2015-09-09_05-26-05PM. 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 e

- 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 startlowing command:

% xhost +

To test that the DISPLAY environment variable is set correctly, run a X11 based program that comes withch 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 furth

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

解决方法：

yum groupinstall "Desktop"

yum groupinstall "X Window System"

yum groupinstall "KDE Desktop"

安装oracle需要图形用户界面，需要安装这些才会出来那个界面

本文转自aaa超超aaa 51CTO博客，原文链接:http://blog.51cto.com/10983441/1737697