I am a beginner in Ubuntu. I want to install Hadoop and Sun Java. After downloading, I have written Ubuntu 12.10 to a DVD. I am also able to boot from the CD. I am currently able to boot from Ubuntu DVD and I do not want to install Ubuntu into Hard Disk to save space. I want to know whether I need to install Ubuntu operating system into my Hard Disk to install Java 6 or hadoop on Ubuntu.?
I have a 64 bit laptop which is currently running on Windows 7 home.