Users who have just started using Ubuntu often encounter such problems: What should I do if I want to install new software? Where are the .exe files? Why are there so many different formats for software? What are RPM packages and .tar.gz? Why can't I install them? And so on. Indeed, installing files in Windows is as simple as a double-click, which is why many people find it inconvenient when using Ubuntu. In fact, installing most software using the Synaptic Package Manager on the Ubuntu platform is simpler and easier than on the Windows platform. Of course, there are also many softwares that are not available in Ubuntu's repository, and these softwares come in various formats, so their installation methods vary as well. Below, I will provide a detailed summary of how to install software on Ubuntu.