How to resolve "no protocol specified error"

Lets see how we can resolve this error thrown out by OUI

>>> Ignoring required pre-requisite failures. Continuing...
Preparing to launch Oracle Universal Installer from /tmp/OraInstall2015-06-16_11-00-02AM. Please wait ...[oracle@oracle1 database]$ 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$2.run(Toolkit.java:821)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804)
        at com.jgoodies.looks.LookUtils.isLowResolution(Unknown Source)
        at com.jgoodies.looks.LookUtils.<clinit>(Unknown Source)
        at com.jgoodies.looks.plastic.PlasticLookAndFeel.<clinit>(PlasticLookAndFeel.java:122)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:242)
        at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1783)
        at javax.swing.UIManager.setLookAndFeel(UIManager.java:480)
        at oracle.install.commons.util.Application.startup(Application.java:758)
        at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:164)
        at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:181)
        at oracle.install.commons.base.driver.common.Installer.startup(Installer.java:265)
        at oracle.install.ivw.db.driver.DBInstaller.startup(DBInstaller.java:114)
        at oracle.install.ivw.db.driver.DBInstaller.main(DBInstaller.java:132)
[oracle@oracle1 database]$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:0C:29:31:31:45
          inet addr:192.168.1.10  Bcast:192.168.1.255  Mask:255.255.255.0
How to resolve

This is caused because you did not set the DISPLAY environment and enabled the access control.

[oracle@oracle1 database]$ export DISPLAY=192.168.1.10:0.0
[oracle@oracle1 database]$ xhost +
access control disabled, clients can connect from any host
[oracle@oracle1 database]$ ./runInstaller
Starting Oracle Universal Installer...

Checking Temp space: must be greater than 120 MB.   Actual 3300 MB    Passed
Checking swap space: must be greater than 150 MB.   Actual 4095 MB    Passed
Checking monitor: must be configured to display at least 256 colors.    Actual 16777216    Passed

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