Installing UNIX based OS in Dual Boot with Windows

Installing UNIX based OS in Dual Boot with Windows

Making a dual booting device with a UNIX based OS and Windows pre-installed is a necessity for almost all Computer Science Engineering students. But the task becomes so daunting sometimes, due to lack of correct info that many end up using it on virtual machines or worse, over telnet services.
Here is a quick guide to installing UNIX based OS with windows OS. We will consider Ubuntu and Windows 7 as examples here. Steps are similar for other variations.