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๐Ÿ“ฆ Chapter 07: Package Management

Beginner Chapter 07

๐Ÿ“‘ Table of Contents

What is a Package Manager?

A package manager automates installing, updating, configuring, and removing software.

๐Ÿ  Analogy: A package manager is like an app store for your terminal. It handles downloads, dependencies, updates, and cleanup โ€” so you don't have to.

Key Concepts

Term Description
Package A bundle of software files + metadata + install scripts
Repository (repo) A server hosting packages
Dependency Other software a package needs to work
Cache Locally stored package files

APT (Debian/Ubuntu)

APT (Advanced Package Tool) is used by Debian, Ubuntu, Linux Mint, Pop!_OS, and derivatives.

Updating & Upgrading

sudo apt update                    # Refresh package lists from repos
sudo apt upgrade                   # Upgrade all installed packages
sudo apt full-upgrade              # Upgrade + remove obsolete packages
sudo apt dist-upgrade              # Major upgrades (kernel, etc.)

๐Ÿ’ก Always run apt update before apt install to ensure you get the latest package versions.

Installing Packages

sudo apt install vim               # Install a single package
sudo apt install vim git curl      # Install multiple packages
sudo apt install -y nginx          # Auto-confirm with -y
sudo apt install ./package.deb     # Install a local .deb file

Removing Packages

sudo apt remove vim                # Remove package (keep config files)
sudo apt purge vim                 # Remove package + config files
sudo apt autoremove                # Remove unused dependencies
sudo apt clean                     # Clear downloaded package cache
sudo apt autoclean                 # Remove old package cache only

Searching & Information

apt search "web server"            # Search for packages
apt show nginx                     # Detailed package info
apt list --installed               # List all installed packages
apt list --upgradable              # List packages with updates
dpkg -l                            # List installed packages (low-level)
dpkg -L nginx                      # List files installed by a package
dpkg -S /usr/bin/vim               # Which package owns this file?
apt-cache depends nginx            # Show package dependencies
apt-cache rdepends nginx           # Reverse deps (who depends on nginx)

Managing Repositories

# List current repos
cat /etc/apt/sources.list
ls /etc/apt/sources.list.d/

# Add a PPA (Personal Package Archive) โ€” Ubuntu only
sudo add-apt-repository ppa:user/repo
sudo apt update

# Remove a PPA
sudo add-apt-repository --remove ppa:user/repo

# Add a third-party repo manually
echo "deb [signed-by=/usr/share/keyrings/example.gpg] https://repo.example.com stable main" | \
  sudo tee /etc/apt/sources.list.d/example.list

Holding Packages (Prevent Updates)

sudo apt-mark hold nginx           # Don't update this package
sudo apt-mark unhold nginx         # Allow updates again
apt-mark showhold                  # List held packages

DNF (Fedora/RHEL)

DNF (Dandified YUM) is used by Fedora, RHEL 9+, CentOS Stream, AlmaLinux, Rocky Linux.

# Update
sudo dnf check-update              # Check for available updates
sudo dnf upgrade                   # Upgrade all packages
sudo dnf upgrade --refresh         # Refresh cache and upgrade

# Install
sudo dnf install vim               # Install a package
sudo dnf install ./package.rpm     # Install a local RPM
sudo dnf install @"Development Tools"  # Install a group of packages
sudo dnf groupinstall "Development Tools"  # Same as above

# Remove
sudo dnf remove vim                # Remove a package
sudo dnf autoremove                # Remove unused dependencies
sudo dnf clean all                 # Clear all caches

# Search & Info
dnf search "web server"            # Search packages
dnf info nginx                     # Package details
dnf list installed                 # List installed packages
dnf list available                 # List all available packages
dnf provides /usr/bin/gcc          # Which package provides this file?
dnf repolist                       # List enabled repos
dnf history                        # Transaction history
dnf history undo 15                # Undo transaction #15

# Repos
sudo dnf config-manager --add-repo https://example.com/repo.repo
sudo dnf config-manager --set-enabled repo-name

Pacman (Arch Linux)

Pacman is used by Arch Linux, Manjaro, EndeavourOS, and Arch-based distros.

# Sync database & upgrade
sudo pacman -Sy                    # Sync package database
sudo pacman -Syu                   # Sync + full system upgrade (ALWAYS do this)

# Install
sudo pacman -S vim                 # Install a package
sudo pacman -S --needed vim git    # Install only if not already installed
sudo pacman -U /path/package.pkg.tar.zst  # Install local package

# Remove
sudo pacman -R vim                 # Remove package
sudo pacman -Rs vim                # Remove + unused dependencies
sudo pacman -Rns vim               # Remove + deps + config files (cleanest)

# Search & Info
pacman -Ss "web server"            # Search repos
pacman -Qs vim                     # Search installed packages
pacman -Si nginx                   # Info from repo
pacman -Qi vim                     # Info about installed package
pacman -Ql vim                     # List files installed by package
pacman -Qo /usr/bin/vim            # Which package owns this file?

# Clean cache
sudo pacman -Sc                    # Remove old cached packages
sudo pacman -Scc                   # Remove ALL cached packages

AUR (Arch User Repository)

The AUR is a community-driven repo with thousands of additional packages.

# Install an AUR helper (yay)
sudo pacman -S --needed git base-devel
git clone https://aur.archlinux.org/yay.git
cd yay && makepkg -si

# Use yay like pacman
yay -S google-chrome               # Install from AUR
yay -Syu                           # System upgrade + AUR
yay -Ss discord                    # Search AUR + repos

Zypper (openSUSE)

sudo zypper refresh                # Refresh repo data
sudo zypper update                 # Update all packages
sudo zypper install vim            # Install
sudo zypper remove vim             # Remove
zypper search vim                  # Search
zypper info vim                    # Package info
sudo zypper dist-upgrade           # Distribution upgrade

Universal Package Managers

These work across all distros:

Snap (Canonical)

sudo apt install snapd             # Install snap daemon
sudo snap install code --classic   # Install VS Code
snap list                          # List installed snaps
sudo snap remove code              # Remove
sudo snap refresh                  # Update all snaps
snap find "media player"           # Search snap store

Flatpak

sudo apt install flatpak           # Install flatpak
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

flatpak install flathub org.gimp.GIMP  # Install from Flathub
flatpak list                       # List installed
flatpak update                     # Update all
flatpak uninstall org.gimp.GIMP    # Remove
flatpak search gimp                # Search

AppImage

# No installation needed โ€” just download and run
chmod +x MyApp.AppImage
./MyApp.AppImage

# Optional: move to /usr/local/bin for system-wide access
sudo mv MyApp.AppImage /usr/local/bin/myapp

Comparison

Feature Snap Flatpak AppImage
Sandbox โœ… Yes โœ… Yes โŒ No
Auto-update โœ… Yes โœ… Yes โŒ Manual
Store snapcraft.io Flathub AppImageHub
Bundle size Larger Smaller (shared runtimes) Self-contained
Distro support Ubuntu-centric All distros All distros

Compiling from Source

When a package isn't in any repository, you can compile it from source:

# 1. Install build dependencies
sudo apt install build-essential cmake git    # Debian/Ubuntu
sudo dnf groupinstall "Development Tools"     # Fedora

# 2. Download source code
git clone https://github.com/example/project.git
cd project

# 3. Configure
./configure --prefix=/usr/local
# or
mkdir build && cd build
cmake ..

# 4. Build
make -j$(nproc)                    # Compile using all CPU cores

# 5. Install
sudo make install

# 6. (Optional) Uninstall
sudo make uninstall

๐Ÿ’ก Tip: Use checkinstall instead of make install to create a proper .deb package that your package manager can track:

sudo apt install checkinstall
sudo checkinstall     # Creates a .deb and installs it

Package Manager Comparison

Action APT (Debian) DNF (Fedora) Pacman (Arch)
Update repos apt update dnf check-update pacman -Sy
Upgrade all apt upgrade dnf upgrade pacman -Syu
Install apt install pkg dnf install pkg pacman -S pkg
Remove apt remove pkg dnf remove pkg pacman -R pkg
Search apt search pkg dnf search pkg pacman -Ss pkg
Info apt show pkg dnf info pkg pacman -Si pkg
List installed apt list --installed dnf list installed pacman -Q
Clean cache apt clean dnf clean all pacman -Sc
File owner dpkg -S /path dnf provides /path pacman -Qo /path

๐Ÿ‹๏ธ Practice Exercises

  1. Update your system using the appropriate package manager
  2. Install htop, tree, and neofetch
  3. Search for a package containing "text editor"
  4. Info: Check the details of the curl package
  5. Find which package owns /usr/bin/python3
  6. Remove neofetch and its unused dependencies
  7. Install an AppImage: Download one from AppImageHub
  8. Compile from source: Try building a small tool like bat or fd

โ† Previous: Users, Groups & Permissions ยท ๐Ÿ  Home ยท Next: Text Editors โ†’

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