How to Install a .deb File in Ubuntu: Methods, Tools, and What to Know First

Ubuntu and most Debian-based Linux distributions use the .deb package format as their native way to distribute software. When you download an application directly from a developer's website — like a browser, code editor, or communication tool — it often comes as a .deb file rather than appearing in Ubuntu's default software repositories. Installing it takes just a few steps, but there's more than one way to do it, and knowing the differences matters.

What Is a .deb File?

A .deb file is a Debian package archive — a compressed bundle that contains the software's executable files, configuration data, and installation instructions. When installed, the package manager unpacks those files into the correct system directories and registers the software so it can be managed, updated, or removed cleanly later.

Unlike simply running an .exe on Windows, installing a .deb on Ubuntu integrates the software into the system's package management layer. That's important because it allows tools like apt to track what's installed and handle dependency resolution — pulling in any additional libraries or components the software needs to run.

Method 1: Install a .deb File Using the GUI (Double-Click)

For users who prefer not to use the terminal, Ubuntu's graphical software installer can handle .deb files directly.

1. Download the .deb file to your system.
2. Navigate to the file in the Files app.
3. Double-click the file — Ubuntu Software Center (or GNOME Software) should open.
4. Click Install and enter your password when prompted.

This is the most accessible method, but it has limits. The GUI installer doesn't always provide detailed error output, and on some Ubuntu versions or desktop environments, the default file manager might open the archive manager instead of the installer. If that happens, right-click the file and select Open With > Software Install.

Method 2: Install a .deb File Using dpkg (Terminal) 🖥️

dpkg is Ubuntu's low-level package manager and the most direct way to install .deb files from the command line.