On an Ubuntu system there was some software that I couldn't remember if I installed it using the apt package manager, or if I used Snap. I thought it was snap.
All I would have to do was run the command that lists all installed Snap software. I found that you can get a list of software installed with Snap by running the following command:
And here's the output from that:
root@somewhere:/var/lib# snap list Name Version Rev Tracking Publisher Notes core 16-2.44.1 8935 latest/stable canonical✓ core core18 20200311 1705 latest/stable canonical✓ base lxd 4.0.0 14709 latest/stable canonical✓ - root@somewhere:/var/lib#
So running that "snap list" command gives a nice output of all the snap packages installed, complete with their version number, revision, tracking, and publisher.