https://snapcraft.io/

• snap is both the command line interface and the application package format
• snapd is the background service that manages and maintains your snaps
• snapcraft is the command and the framework used to build your own snaps
• Snap Store provides a place to upload your snaps, and for users to browse and install

https://snapcraft.io/tutorials/advanced-snap-usage#4-availability-logs–states-in-snaps–services

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