Welcome to Linux! For how to download something with Linux, you've got options. If you're on Ubuntu, start with the Software Center—it's like an app store. Just search for what you need and click install.
For .deb files (Ubuntu/Debian), double-clicking usually works. .rpm is for Fedora/openSUSE, so ignore those unless you're on those distros.
Terminal is powerful but not always needed. If you *do* wanna try it, `sudo apt install [package-name]` is your friend.
Also, .tar.gz is a compressed archive—think of it like a zip file. Extract it with right-click or `tar -xzf file.tar.gz`.
For .deb files (Ubuntu/Debian), double-clicking usually works. .rpm is for Fedora/openSUSE, so ignore those unless you're on those distros.
Terminal is powerful but not always needed. If you *do* wanna try it, `sudo apt install [package-name]` is your friend.
Also, .tar.gz is a compressed archive—think of it like a zip file. Extract it with right-click or `tar -xzf file.tar.gz`.