How to install ANYTHING in Ubuntu!

Having problems installing something on your new Ubuntu operating system? "Where's the EXE?", "Where do I need to extract this to?", "How do I run it?", "Where did it go?" - have you been thinking questions like these?

Don't worry, installing software, themes and other things on Ubuntu is actually very easy!

This guide will help you understand with screenshots, instructional videos and to-the-point language.
Translations: Português (Portuguese), Magyar (Hungarian)

• The package manager
• Installing software with Synaptic
  
  • The 3 steps: Search, mark and apply
  • But what if my program isn't available through Synaptic?
  • I installed it, but where did my program go?
  • How do I uninstall the program?
• Installing software with the terminal
• Installing a package manually (.deb, .rpm, .tar.gz, .package, klik:// → .cmg, .sh, .bin, .exe, ...)
• Appendix
  
  • Enabling extra repositories
  • Using CDs as offline repositories
  • Navigating the terminal
  • Adding a launcher/shortcut to your desktop
  • Changing permissions
  • Why I created this guide

Note: The guide was written for Ubuntu 6.06 - The Dapper Drake using the tools of the Gnome desktop environment as its base. The program names and paths will undoubtedly vary if you're using Kubuntu or Xubuntu.
How to install ANYTHING in Ubuntu!