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    You are at:Home»Package Management»Working with the Snap Package in Linux

    Working with the Snap Package in Linux

    By RahulMay 24, 20224 Mins Read

    What is Snap?

    Snap or Snappy is a package management system developed by Canonical for the Linux operating system. The packages are called snaps, and the tool for using them is snapd, which works across a range of Linux distributions. A Snap package are containerized software package that contains all the requirements in it. The snaps are easy-to-install packages and provide auto-update features.

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    What is Snapcraft?

    Snapcraft is a powerful command-line tool for developers to create new Snap packages from their programs. It can run on a Linux system as well as on Windows and macOS. Snapcraft reads a simple and declarative file and runs the build for us to build snap packages.

    You can install a wide range of packages available on the Snapcraft store in a single command.

    How to Install Snapd on Linux

    Snapd is a REST API daemon for managing snap packages. It also provides a snap command-line utility for client machines to interact with the snapd daemon. Users can interact with it by using the snap client.

    Most of the latest Linux operating systems are pre-installed with the snapd daemon service. But if your Linux machine doesn’t have snapd installed, use one of the following commands to install it.

    • To install Snapd on Debian based systems, type:
      sudo apt install snapd 
      
    • To install Snapd on Redhat based systems, type:
      sudo dnf install snapd 
      

    Once the installation is finished, snapd daemon will be up and running on your system. You can find the status of the service with the following command.

    sudo systemctl status snapd 
    

    Searching for Snap Packages

    Snap command line utility provides you option to search for available snap packages/applications on snapcraft store. You can directly search applications on online Snapcrat store.

    You can also use find sub-command followed by the package name to search. To find Snap packages, type:

    sudo snap find postman 
    

    How to Search a Snap Package

    How to Install a Snap Package

    You can install any package available on snapcraft store with the following command. To install package type:

    sudo snap install postman 
    

    Snappy also maintains the different channels for package installation. This allows users to install any package stable version, beta, or daily updated versions. Here are the 4 major channels available for snap packages:

    • stable: Stable version of packages, recommended for the most of users or production environments.
    • candidate: It provides packages with updates prior to stable deployment, or those verifying whether a specific issue has been resolved.
    • beta: for users wanting to test the latest features, typically outside of a production environment.
    • edge: for users wanting to closely track development.

    You can use --channel to specify the channel name to install the package from It. Channel is a snap concept that stands for the release of a snap.

    To install beta release:

    sudo snap install postman --channel=beta
    

    To install edge release:

    sudo snap install postman --channel=edge
    

    List Installed Snap Packages

    Use snap list command to view all the installed snaps on your system. To view installed packages, type:

    sudo snap list 
    

    How to List installed Snap packages

    How to Upgrade Snap Packages

    The Snap packages are automatically update by default. You can also update it manually using the command line. To find out the available updates for the packages, execute:

    sudo snap refresh --list 
    

    Use the below command to update snap packages on your system.

    sudo snap refresh 
    

    How to Upgrade Snap packages

    How to Downgrade a Snap Package

    Snapd also allows reverting any package to the previous version. If you accidentally updated for the package or you don’t like the upgraded package. Use the following command to revert any package:

    sudo snap revert <package_name> 
    

    This will revert both the snap revision and the data associated with the application.

    Removing Snap Packages

    You can remove snap packages anytime, whenever you don’t’ required. Run the following command with the package name to remove from your system:

    sudo snap remove <package_name> 
    

    How to Remove a Snap Package

    The above command will remove all the associated user data, applications and dependencies from the systems. It will also stop and remove all the associated services with that package.

    Conclusion

    In this tutorial, you have learned about Linux snap packages. You get a basic understanding of installing, updating, and removing the snap packages on a Linux system.

    packages snapcraft snapd snappy Snaps
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