Install Java Runtime Environment on Ubuntu Karmic Koala
This simple tutorial will show you how to install the Java Runtime Environment (JRE) on Ubuntu Karmic Koala. Java is needed in most software on Linux or Windows system. Actually, Java is an object-oriented programming language developed by Sun Microsystems.
Currently Ubuntu has the following Java packages:
sun-java6-bin – Contains the binaries
sun-java6-demo – Contains demos and examples
sun-java6-doc – Contains the documentation
sun-java6-fonts – Contains the Lucida TrueType fonts from the JRE
sun-java6-jdk – Contains the metapackage for the JDK
sun-java6-jre – Contains the metapackage for the JRE
sun-java6-plugin – Contains the plug-in for Mozilla-based browsers
sun-java6-source – Contains source files for the JDK
Steps to install Java Runtime Environment on Ubuntu Karmic Koala:
First make sure you already checked the multiverse and universe repository under your software sources. Next type this command below to install JRE:
sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts
Wait until installation finished and you can test your JRE installation by typing the following command on terminal.
java -version
You should get similar output
java version “1.6.0?
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)
Also you can test Java Plugin for Firefox:
open Firefox and type
about:plugins
in the address bar and check for java plugin

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