When I installed Ubuntu 10.04 and BackTrack 5, I didn't create any directories for either operating system BUT the root directory (i.e., /). I assume the root was mandatory because I couldn't proceed with the install unless I did.
I've been trying to install some software applications in Ubuntu and have been unsuccessful. Now, this may be due to my lack of knowledge as I don't have much experience with Linux OS, or my other assumption is that I neglected to create proper directories during the install of the OS.
Now, my question is this: why do most tutorials recommend creating "home," "swap," and other directories when installing Linux operating systems when, as I looked under my directory tree, I see they were all created (well, not swap, but home was)? See the following screenshot from Ubuntu: