Installing Sun JAVA in Ubuntu
Step by step: Download JDK from Sun/Oracle . Choose bin version (not rpm). The file would be in form of jdk-version-platform.bin (in my case it was: jdk-6u25-linux-x64.bin ) Add execution rights to the downloaded file $ chmod u+x jdk-6u25-linux-x64.bin Execute script. It will unpack its content to current directory (press Enter when asked) $ ./jdk-6u25-linux-x64.bin Now you should have directory i.e. jdk1.6.0_25/ with JDK files in it. Move unpacked JDK to final destination e.g. /opt/java/ $ sudo mv jdk1.6.0_25/ /opt/java/ Create symbolic link to that directory that will represent this JDK in general regardless current version. It will ease the future updates of JDK . I can any name. I have chosen sun-java6-manual $ cd /opt/java/ $ sudo ln -s jdk1.6.0_25 sun-java6-manual Now create another symbolic link in /usr/lib/jvm pointing to previous one. $ ...