I've started using Ubuntu recently and I'm still getting used to the new shortcuts and others.
Since the installation was also done by me, I encountered few issues.
Following are the few things which one could encounter and I've included the links to save time.
How to install JDK on Ubuntu…
wget http://download.oracle.com/otn-pub/java/jdk/6u34-b04/jdk-6u34-linux-i586.bin $ chmod u+x jdk-6u34-linux-i586.bin $ ./jdk-6u34-linux-i586.bin $ sudo mkdir -p /usr/lib/jvm $ sudo mv jdk1.6.0_34 /usr/lib/jvm/ $ sudo update-alternatives –install “/usr/bin/java” “java” “/usr/lib/jvm/jdk1.6.0_34/bin/java” 1 $ sudo update-alternatives –install “/usr/bin/javac” “javac” “/usr/lib/jvm/jdk1.6.0_34/bin/javac” 1 $ sudo update-alternatives –install “/usr/lib/mozilla/plugins/libjavaplugin.so” “mozilla-javaplugin.so” “/usr/lib/jvm/jdk1.6.0_34/jre/lib/i386/libnpjp2.so” 1 $ sudo update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/lib/jvm/jre1.6.0_34/bin/javaws” 1
IMPORTANT choose the java you installed as default
How to enable hibernation
[Re-enable hibernate by default]
How to install MongoDB
sudo service mongodb stop
How to solve the VirtualBox Error
sudo /etc/init.d/vboxdrv setup
sudo apt-get install linux-headers-$(uname -r)
Thanks everyone who have contributed to the solutions. Without those, it is not possible for people like me to proceed further.