snap and flatpak in Linux CLI - Mini Project: Build & Apply

Managing Software with Snap and Flatpak

📖 Scenario: You are a system administrator who needs to manage software packages on a Linux system. You want to list installed applications and check for updates using two popular package systems: snap and flatpak.

🎯 Goal: Build a simple script that collects installed snap and flatpak applications, checks for available updates, and displays the results clearly.

📋 What You'll Learn

Use the snap command to list installed snap packages

Use the flatpak command to list installed flatpak applications

Create variables to store the lists of installed packages

Create variables to store the output of update checks for both snap and flatpak

Print the lists of installed packages and available updates

💡 Why This Matters

🌍 Real World

System administrators often need to manage software packages on Linux systems using different package managers like snap and flatpak. This script helps quickly check installed software and available updates.

💼 Career

Knowing how to automate package management tasks with scripting is valuable for Linux system administrators and DevOps engineers to maintain system security and software currency.

1

List Installed Snap and Flatpak Packages

Create two variables called snap_installed and flatpak_installed. Use the commands snap list and flatpak list respectively to store the lists of installed packages as strings.

Linux CLI

# Create variables snap_installed and flatpak_installed to store installed packages
# Your code here

Hint

Use command substitution with $(command) to store command output in variables.

2

Check for Available Updates

Create two variables called snap_updates and flatpak_updates. Use the commands snap refresh --list and flatpak update --assumeno respectively to check for available updates and store the output as strings.

Linux CLI

# Create variables snap_updates and flatpak_updates to store update check results
# Your code here

Hint

Use --list with snap refresh to see available updates without applying them.

Use --assumeno with flatpak update to simulate update check without installing.

3

Prepare Summary of Installed Packages and Updates

Create a variable called summary that combines the installed packages and update information for both snap and flatpak. Format it as a multi-line string with clear section headers: Installed Snap Packages:, Installed Flatpak Applications:, Available Snap Updates:, and Available Flatpak Updates:. Use newline characters \n to separate sections.

Linux CLI

# Create a summary variable combining all information with headers
# Your code here

Hint

Use double quotes to allow variable expansion and \n for new lines inside the string.

4

Display the Summary

Use the echo command to print the summary variable to the terminal.

Linux CLI

# Print the summary variable
# Your code here

Hint

Use echo "$summary" to print the multi-line string with all information.

Practice

1. What is the main purpose of using snap and flatpak on Linux?

easy

A. To replace the Linux kernel with a new version

B. To install and run applications in a safe, isolated way

C. To manage user accounts and permissions

D. To compile source code into executable programs

Solution

1. Step 1: Understand the role of snap and flatpak

   Snap and Flatpak are tools to install and run apps safely on Linux by isolating them from the system.

2. Step 2: Compare options with this purpose

   The remaining options describe unrelated system tasks like kernel replacement, user management, and code compilation, so they are incorrect.

3. Final Answer:

   To install and run applications in a safe, isolated way -> Option B

4. Quick Check:

   Snap and Flatpak isolate apps = A [OK]

Hint: Snap and Flatpak isolate apps for safety and easy install [OK]

Common Mistakes:

• Thinking snap/flatpak manage system settings
• Confusing them with system update tools
• Assuming they compile code

2. Which command correctly installs the VLC media player using snap?

easy

A. snap install vlc

B. flatpak install vlc

C. snap get vlc

D. flatpak run vlc

Solution

1. Step 1: Identify the snap install syntax

   The correct command to install a snap package is snap install [package].

2. Step 2: Check options for VLC installation

   'snap get vlc' is not for installing. 'flatpak install vlc' uses the wrong tool for snap. 'snap install vlc' matches the correct syntax. 'flatpak run vlc' launches but does not install.

3. Final Answer:

   snap install vlc -> Option A

4. Quick Check:

   Snap install command = C [OK]

Hint: Use 'snap install' to add apps via snap quickly [OK]

Common Mistakes:

• Using 'snap get' instead of 'snap install'
• Confusing flatpak commands with snap
• Trying to run app before installing

3. What will be the output of the command flatpak list if you have installed two apps: VLC and GIMP?

medium

A. VLC and GIMP listed with their app IDs and versions

B. No output, command not found

C. Only VLC listed

D. Error: No apps installed

Solution

1. Step 1: Understand what 'flatpak list' does

   This command shows all installed flatpak apps with details like app ID and version.

2. Step 2: Apply to given apps

   Since VLC and GIMP are installed, both will appear in the list with their info.

3. Final Answer:

   VLC and GIMP listed with their app IDs and versions -> Option A

4. Quick Check:

   flatpak list shows installed apps = B [OK]

Hint: flatpak list shows all installed apps and details [OK]

Common Mistakes:

• Expecting no output or error if apps exist
• Thinking it lists only one app
• Confusing with snap commands

4. You run snap remove vlc but get an error saying "error: no matching snaps installed". What is the likely problem?

medium

A. You need to use 'snap uninstall' instead

B. You typed the command incorrectly

C. Snap service is not running

D. VLC was installed using flatpak, not snap

Solution

1. Step 1: Analyze the error message

   The error means snap cannot find an installed package named vlc.

2. Step 2: Consider installation methods

   If VLC was installed via flatpak, snap won't see it. So removing with snap fails.

3. Final Answer:

   VLC was installed using flatpak, not snap -> Option D

4. Quick Check:

   Snap can't remove apps installed by flatpak = A [OK]

Hint: Check if app was installed by snap or flatpak before removing [OK]

Common Mistakes:

• Assuming 'snap uninstall' is valid (it's 'remove')
• Ignoring which package manager installed the app
• Thinking snap service status causes this error

5. You want to automate installing multiple apps using flatpak in a script. Which snippet correctly installs VLC and GIMP and then lists installed apps?

hard

A. flatpak install -y org.videolan.VLC org.gimp.GIMP; snap list

B. flatpak install org.videolan.VLC org.gimp.GIMP && flatpak list

C. flatpak install -y flathub org.videolan.VLC org.gimp.GIMP && flatpak list

D. flatpak install -y org.videolan.VLC && flatpak install org.gimp.GIMP && flatpak list

Solution

1. Step 1: Understand flatpak install syntax for multiple apps

   You can install multiple apps in one command by listing them after 'flatpak install'. The '-y' flag auto-confirms prompts.

2. Step 2: Check command chaining and listing

   flatpak install -y flathub org.videolan.VLC org.gimp.GIMP && flatpak list installs both apps with '-y' and explicit remote, then lists. flatpak install org.videolan.VLC org.gimp.GIMP && flatpak list misses '-y', so prompts block automation. flatpak install -y org.videolan.VLC && flatpak install org.gimp.GIMP && flatpak list uses separate commands but misses '-y' on second install, causing a prompt. flatpak install -y org.videolan.VLC org.gimp.GIMP; snap list mixes flatpak install with snap list, which won't show flatpaks.

3. Final Answer:

   flatpak install -y flathub org.videolan.VLC org.gimp.GIMP && flatpak list -> Option C

4. Quick Check:

   Use '-y' for auto yes and chain commands = D [OK]

Hint: Use '-y' to auto-confirm and chain commands with && [OK]

Common Mistakes:

• Forgetting '-y' causes manual prompts
• Mixing snap and flatpak commands
• Installing apps one by one unnecessarily