Package Managers

By the end of this lesson you'll be able to install, update, and remove software from the command line on any major system — Debian/Ubuntu (apt), Fedora/RHEL (dnf), Arch (pacman), and macOS (Homebrew) — and you'll know why some managers need sudo and others (like pip and npm) do not.

Learn Package Managers in our free Command Line course — an interactive lesson with worked examples, a practice exercise and a quick reference.

Part of the free Cli course at LearnCodingFast — hands-on lessons with examples you run in your browser, plus practice exercises and a quick quiz.

What You'll Learn

1. What a Package Manager Is

A package manager installs, updates, and removes software for you, and — crucially — it resolves dependencies . A package is bundled software plus metadata (its name, version, and what it needs); a dependency is another package it relies on. The manager pulls everything from repositories (online catalogs of packages), so you install a program by name without chasing down installers yourself. Every manager does the same four jobs: install , remove , update/upgrade , and search — only the command name changes.

2. Debian & Ubuntu: APT

Debian, Ubuntu, and Mint use APT . The one rule beginners trip on: sudo apt update only refreshes the package index (the lists of what's available) — it does not install anything. To actually apply the new versions you run sudo apt upgrade . So the everyday pattern is "update, then upgrade." Install and remove single packages with sudo apt install <pkg> and sudo apt remove <pkg> .

3. Fedora & RHEL: dnf (and yum)

Fedora, RHEL, CentOS, and Rocky use dnf , the modern replacement for the older yum (the two share almost identical commands, so yum often still works). Install with sudo dnf install <pkg> , remove with sudo dnf remove <pkg> , update everything with sudo dnf update , and look things up with dnf search <term> .

4. Arch Linux: pacman

Arch Linux and Manjaro use pacman , which uses short flags: -S to sync/install , -R to remove , -Syu to refresh the lists and upgrade everything at once, and -Ss to search . So sudo pacman -S firefox installs Firefox, and sudo pacman -Syu is the standard "update my whole system" command.

5. macOS: Homebrew

macOS commonly uses Homebrew , invoked as brew . Install with brew install <pkg> , remove with brew uninstall <pkg> , refresh Homebrew and its formula lists with brew update , and upgrade what's installed with brew upgrade . Unlike the Linux managers, Homebrew installs into its own prefix that your user owns , so it does not need sudo — and running sudo brew can actually break your install.

6. System Managers vs. Language/Project Managers

There are two layers, and mixing them up causes real trouble. System managers — apt, dnf, pacman, brew — install programs for the whole machine and (except brew) need sudo . Language/project managers — pip (Python), npm (Node), gem (Ruby) — install code libraries for one language, usually per-project or per-user. They are not system package managers and generally should not be run with sudo . Rule of thumb: apt/dnf/pacman/brew install programs ; pip/npm/gem install libraries .

🎯 Your Turn: install with APT

Fill in the two blanks marked ______ using the # 👉 hints. Remember which apt subcommand refreshes the lists and which one installs.

🎯 Your Turn: match the manager

Two blanks again: the pacman flag that installs on Arch, and the command name you use on macOS (with no sudo).

Pro Tips

• 💡 Update before you install: on APT, run sudo apt update first so you install the newest version available — then sudo apt install <pkg> .
• 💡 Install several at once: every manager takes a list — sudo apt install git curl htop or sudo pacman -S git curl htop .
• 💡 Never sudo Homebrew, pip, or npm: brew owns its own prefix, and language managers work per-user/project. Using sudo with them invites permission breakage.
• 💡 Search before you guess: apt search <term> , dnf search <term> , pacman -Ss <term> , or brew search <term> to find the exact package name.

Common Errors (and the fix)

• "Permission denied" / "are you root?" — a system manager needs root. Prefix the command with sudo (e.g. sudo apt install ... ). The exception is Homebrew, which must not use sudo.
• "Unable to locate package" on APT — your lists are stale or the name is wrong. Run sudo apt update first, and check the spelling with apt search <term> .
• "apt update did nothing" — that's expected: apt update only refreshes the lists. To install the new versions, run sudo apt upgrade .
• "sudo brew" warns or breaks things — don't use sudo with Homebrew. If you already did and permissions are off, see brew doctor .
• Reaching for sudo pip / sudo npm — these are language/project managers, not system managers. Install per-user or in a project/virtual environment instead of using sudo.

📋 Quick Reference

System

Install

Remove

Update / Upgrade

Search

Debian/Ubuntu (apt)

sudo apt install x

sudo apt remove x

sudo apt update / upgrade

apt search t

Fedora/RHEL (dnf)

sudo dnf install x

sudo dnf remove x

sudo dnf update

dnf search t

Arch (pacman)

sudo pacman -S x

sudo pacman -R x

sudo pacman -Syu

pacman -Ss t

macOS (brew, no sudo)

brew install x

brew uninstall x

brew update / upgrade

brew search t

Language libs (no sudo)

pip / npm / gem install

pip / npm / gem uninstall

per project / user

on the registry

Frequently Asked Questions

Mini-Challenge: new-machine setup

No blanks this time — just a brief. Write the commands to install git, curl, and htop on three platforms (Ubuntu with apt, Arch with pacman, macOS with Homebrew), and add a comment explaining why only the macOS line skips sudo .

🎉 Lesson Complete!

• ✅ A package manager installs, updates, and removes software and resolves dependencies from repositories
• ✅ Debian/Ubuntu use apt : apt update refreshes the lists, apt upgrade applies them
• ✅ Fedora/RHEL use dnf (older: yum ); Arch uses pacman ( -S , -R , -Syu , -Ss )
• ✅ macOS uses brew — and it does not need sudo , because it owns its own prefix
• ✅ pip, npm, and gem are language/project managers, not system managers — avoid sudo with them
• ✅ Next lesson: SSH and Remote Access — log in to and run commands on other machines securely

Practice quiz

Continue this course

• Previous: Processing JSON with jq
• Next: SSH and Remote Access

Related lessons

• Introduction