Hacking the Ubuntu Installation

Extremetech has a detailed article on this.

Read Complete Article Here:

Installing the Server or Workstation
Using the Desktop or Alternate CD-ROM
Changing Options
Installing a Minimal System and Installing Over a Network
Installing on a Mac and Using a USB Drive
Sharing Files and Booting with a USB Drive
Kicking Off the Network Install with a USB Drive and Using a Boot Image with Files
Installing a Full File System
Booting Variations
Upgrading Ubuntu
Upgrading Issues with Ubuntu

 All Credits to Extremetech.com for this.