DNF vs. APT: A Workflow Comparison

The Two Major Families: RPM vs. DEB

At a high level, Linux distributions are often grouped by the package format they use.

• Fedora, Red Hat Enterprise Linux (RHEL), and CentOS use the RPM (.rpm) package format. Their high-level package manager is DNF.
• Debian, Ubuntu, and Linux Mint use the DEB (.deb) package format. Their high-level package manager is APT.

While the end goal—installing, updating, and removing software—is the same, their commands and philosophies have some key differences.

A Practical Walkthrough of APT and DNF

The best way to see the differences is to watch both package managers in action. The following video demonstrates the essential tasks—installing, removing, and updating—on both a Debian-based system (using APT) and a Fedora-based system (using DNF).

From the video, you probably noticed a few key differences in the workflow:

• Updating: The Debian user first ran apt update to refresh the list of available packages before doing anything else.
• Removal: After running apt remove, there were leftover "orphaned" packages that required a separate apt autoremove command to clean up.
• Package Names: The Apache web server was called apache2 on Debian but httpd on Fedora. This is a common variation you'll see between distribution families.

Command-for-Command Comparison

Now, let's break down the comparison by task. For a quick reference, here is a handy cheat sheet that puts the most common commands side-by-side.

Let's dive deeper into the most important differences from that table.

1. Updating and Upgrading

This is arguably the most significant workflow difference.

• APT uses a two-step process:
  1. sudo apt update: Fetches the latest list of packages from the repositories.
  2. sudo apt upgrade: Compares the installed packages to the new list and upgrades them.
• DNF uses a single step:
  1. sudo dnf upgrade: Automatically checks for and downloads the latest package lists if needed, and then performs the upgrade. The dnf update command is an alias and does the same thing.

This video segment explains the convenience of DNF's approach.

2. Installing Packages

The installation command itself is nearly identical.

• sudo apt install <package_name>
• sudo dnf install <package_name>

However, as the image below shows, the output you see during the installation can look quite different.

Additionally, DNF has a handy feature for installing entire collections of software designed for a specific purpose, called "groups." For example, you could install a full suite of graphic design tools with sudo dnf group install "Design Suite".

3. Removing Packages and Dependencies

This is another area with a major workflow difference.

• DNF: When you run sudo dnf remove <package_name>, it removes the package and any dependencies that were installed with it that are no longer needed by any other package. It's an all-in-one cleanup.
• APT: sudo apt remove <package_name> only removes that specific package. As you saw in the video, you must then run sudo apt autoremove to clean up the orphaned dependencies.

APT also has a special command, purge, which removes a package and its system-wide configuration files.

• sudo apt purge <package_name>

dnf remove does not touch configuration files, which is often safer but means you might need to manually remove them from /etc if you want a complete cleanup.

Practical Synthesis: Your First Ubuntu Task

You can't run apt on your Fedora machine, but we can do a thought exercise. This is a very common task you'll face as a web developer.

Your Task:
Imagine your project manager gives you a fresh Ubuntu 22.04 server and asks you to set up the basic environment for a new Django project. You need to install the Nginx web server, the PostgreSQL database server, and Python.

Based on what you've learned, write down the exact sequence of commands you would use to accomplish this on the Ubuntu server. Then, write down the equivalent commands for your Fedora machine.

# 1. First, refresh the package lists
sudo apt update




# 2. It's good practice to install any pending system upgrades
sudo apt upgrade -y




# 3. Install all the required packages in a single command
sudo apt install nginx postgresql python3 -y 

# 1. Upgrade the system (this also refreshes the package lists)
sudo dnf upgrade -y




# 2. Install all the required packages. Note that the package name for
#    the PostgreSQL server is postgresql-server on Fedora.
sudo dnf install nginx postgresql-server python3 -y

This exercise highlights the key differences: the mandatory apt update step for Ubuntu and the slight variation in package names (postgresql vs. postgresql-server).

Conclusion

You now have a solid understanding of the two dominant package management systems in the Linux world. While the commands are slightly different, the underlying concepts are very similar. This knowledge will make you far more adaptable when you encounter different server environments in your career.

Key Takeaways:

• Package Families: DNF manages .rpm packages (Fedora/RHEL), while APT manages .deb packages (Debian/Ubuntu).
• Upgrading: DNF uses a one-step upgrade, while APT uses a two-step update then upgrade.
• Dependency Removal: DNF's remove command automatically cleans up dependencies. APT requires a separate autoremove command.
• Configuration Files: APT has a purge command to remove configuration files; with DNF, this is a manual step.
• Command Syntax: Many core commands like install, remove, and search are syntactically very similar.

In our next module, we'll move from managing the system with individual commands to automating tasks. You'll learn the fundamentals of Bash scripting, allowing you to write simple programs that execute sequences of commands. This is a foundational skill for both system administration and for automating development and deployment workflows.