Oracle Database Discussions

Hi

i review some documents regarding the installation of oracle 11g i follow every steps carefully until i executed the command run installer and then i have got the following error:

oracle@mintlinux-oraccle ~/database $ ./runInstaller

Starting Oracle Universal Installer...

Checking Temp space: must be greater than 120 MB. Actual 46129 MB Passed

Checking swap space: must be greater than 150 MB. Actual 3320 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/OraInstall2017-03-21_12-01-29AM. Please wait ...oracle@mintlinux-oraccle ~/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)

the trial that I execute to sole my problem is posted below

1. Ctrl + Alt + F2 star new tty and logon as ROOT and startx to Log on to XWindows
2. Open a terminal
3. enter 'xhost +'
4. enter 'su - oracle'
5. enter 'export DISPLAY=:0.0'
6. runInstaller

is this error coming from the OS or some thing related to java loading ?? is there any suggestions ??

thank you agin.