I got this error while installing oracle 11g in my laptop with centos 5.3

the error is:

./runInstaller
Starting Oracle Universal Installer...

Checking Temp space: must be greater than 80 MB. Actual 76430 MB Passed
Checking swap space: must be greater than 150 MB. Actual 6000 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 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/OraInstall2010-03-07_12-09-48PM. Please wait ...[oracle@www database]$ Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Exception in thread "main" java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at java.awt.Toolkit$2.run(Toolkit.java:821)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804)
at com.jgoodies.looks.LookUtils.isLowResolution(Unknown Source)
at com.jgoodies.looks.LookUtils.<clinit>(Unknown Source)
at com.jgoodies.looks.plastic.PlasticLookAndFeel.<clinit>(PlasticLookAndFeel.java:122)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1783)
at javax.swing.UIManager.setLookAndFeel(UIManager.java:480)
at oracle.install.commons.util.Application.startup(Application.java:758)
at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:164)
at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:181)
at oracle.install.commons.base.driver.common.Installer.startup(Installer.java:265)
at oracle.install.ivw.db.driver.DBInstaller.startup(DBInstaller.java:114)
at oracle.install.ivw.db.driver.DBInstaller.main(DBInstaller.java:132)


plesase help me solve this....give me detailed instructions i am new to linux.

The machine should have entered runlevel 5 (graphical subsystem) and the DISPLAY variable should be exported. If you're not running a X11/Xorg then you could perform a "silent mode" installation using a response file. In any case reading the documentation before you actually install Oracle may be beneficial as it may cover your "give me detailed instructions" question.

Firstly Thank you everyone for giving me your suggestions.

I tried installing oracle 11g in centos using Tim's tutorial and all went fine initially i got the oracle 11g installation GUI and after passing through some intial steps i got an error while starting database configuration.

The error was : TNS failed
and i got two options in that dialog box "ignore" and "abort"

after press ignore a few times.the installation finished successfully.

When i opened terminal and typed

sqlplus SYS as SYSDBA

it asked for password

when i gave the password again it showed the error TNS failed


kindly someone help me solve this.....

So you ignored errors, and you're surprised it's not working??

The best people to help you with Oracle problems is ORACLE, give them a call. You're paying for support, and they can give you exact information and details.