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Linux CLIscripting~20 mins

snap and flatpak in Linux CLI - Practice Problems & Coding Challenges

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Challenge - 5 Problems
🎖️
Snap & Flatpak Master
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Test your skills under time pressure!
💻 Command Output
intermediate
2:00remaining
Identify the output of listing installed Snap packages
What is the output of the command snap list if you have installed 'vlc' and 'spotify' snaps?
Linux CLI
snap list
AError: command not found
B
vlc 3.0.11 2344 stable
spotify 1.1.55 42 stable
C
vlc
spotify
D
Name  Version  Rev  Tracking  Publisher  Notes
vlc   3.0.11   2344 stable    videolan✓  -
spotify 1.1.55  42   stable    spotify✓   -
Attempts:
2 left
💡 Hint
The snap list command shows detailed columns about installed snaps.
💻 Command Output
intermediate
2:00remaining
Determine the output of listing installed Flatpak applications
What is the output of the command flatpak list if you have installed 'org.gimp.GIMP' and 'com.spotify.Client'?
Linux CLI
flatpak list
A
Application ID           Version Branch Installation
org.gimp.GIMP            2.10.28 stable system
com.spotify.Client       1.1.55  stable system
B
Name: org.gimp.GIMP Version: 2.10.28
Name: com.spotify.Client Version: 1.1.55
C
org.gimp.GIMP
com.spotify.Client
DError: flatpak command not found
Attempts:
2 left
💡 Hint
The flatpak list command shows a table with columns including Application ID and Version.
📝 Syntax
advanced
1:30remaining
Which command correctly installs VLC using Snap?
Choose the correct command to install VLC media player using Snap.
Asnap add vlc
Bsnap get vlc
Csnap install vlc
Dsnap update vlc
Attempts:
2 left
💡 Hint
The command to install a snap package uses the word 'install'.
💻 Command Output
advanced
1:30remaining
What error does this Flatpak uninstall command produce if the app is not installed?
What error message appears when running flatpak uninstall org.gimp.GIMP if 'org.gimp.GIMP' is not installed?
Linux CLI
flatpak uninstall org.gimp.GIMP
AError: No matching refs found for uninstall
BUninstalled org.gimp.GIMP successfully
Cflatpak: command not found
DPermission denied
Attempts:
2 left
💡 Hint
If the app is not installed, Flatpak reports no matching references found.
🚀 Application
expert
2:30remaining
Compare Snap and Flatpak commands for updating all installed apps
Which option correctly shows commands to update all installed Snap and Flatpak applications respectively?
Asnap update && flatpak refresh
Bsnap refresh && flatpak update
Csnap upgrade && flatpak upgrade
Dsnap refresh all && flatpak update all
Attempts:
2 left
💡 Hint
Snap uses 'refresh' to update, Flatpak uses 'update'.

Practice

(1/5)
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
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