Debian 10 - install snap command (snap package manager)

In this short article, we would like to show how to install snap command under Debian 10 (it should be working with Debian 11).

Quick steps:

1. upgrade available packages list using:

   sudo apt-get update

2. install snapd package using:

   sudo apt-get install snapd

   Note: snapd contains snap command.

3. install snap core package using:

   sudo snap install core

4. check if snapd service / daemon is working using:

   sudo systemctl status snapd

   Example output:

   ● snapd.service - Snappy daemon
      Loaded: loaded (/lib/systemd/system/snapd.service; enabled; vendor preset: enabled)
      Active: active (running) since Wed 2021-11-03 03:57:56 CDT; 20s ago
    Main PID: 3386 (snapd)
       Tasks: 26 (limit: 4915)
      Memory: 57.7M
      CGroup: /system.slice/snapd.service
              └─3386 /usr/lib/snapd/snapd
   
   Nov 03 03:57:55 debian systemd[1]: Starting Snappy daemon...
   Nov 03 03:57:55 debian snapd[3386]: AppArmor status: apparmor is enabled but some kernel features are missing: dbus, network
   Nov 03 03:57:55 debian snapd[3386]: AppArmor status: apparmor is enabled but some kernel features are missing: dbus, network
   Nov 03 03:57:55 debian snapd[3386]: patch.go:63: Patching system state level 6 to sublevel 1...
   Nov 03 03:57:55 debian snapd[3386]: patch.go:63: Patching system state level 6 to sublevel 2...
   Nov 03 03:57:55 debian snapd[3386]: patch.go:63: Patching system state level 6 to sublevel 3...
   Nov 03 03:57:55 debian snapd[3386]: daemon.go:242: started snapd/2.52.1 (series 16; classic; devmode) debian/10 (amd64) linux/4.19.0-17-amd64.
   Nov 03 03:57:55 debian snapd[3386]: daemon.go:335: adjusting startup timeout by 35s (pessimistic estimate of 30s plus 5s per snap)
   Nov 03 03:57:56 debian snapd[3386]: helpers.go:105: error trying to compare the snap system key: system-key versions not comparable
   Nov 03 03:57:56 debian systemd[1]: Started Snappy daemon.

   Note: if snapd is not active use the following command: sudo systemctl start snapd.