'snap list' shows 3 installed packages, can I still purge snapd on Ubuntu 20.04 LTS?

Question

I found with a search machine Safe to remove snap on Ubuntu Server?. In this posting his snap list output is empty. No installed packages.

At me the list not empty..

version, Raspberry Pi 4 hardware (64bit image):

cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04 LTS"

snap info

snap list
Name    Version    Rev    Tracking         Publisher   Notes
core    16-2.45.1  9441   latest/stable    canonical✓  core
core18  20200427   1753   latest/stable    canonical✓  base
lxd     4.2        15763  latest/stable/…  canonical✓  -

What is this? What are core, core18 and lxd? Is it needed?

Is it still safe to do those cleanup commands?

sudo apt purge snapd
sudo apt autoremove

Answer 1

Yes, it is safe.

lxd is a container manager, the other two are the core runtime environment for snapd and the base snap, originally for Ubuntu 18.04.

You can remove them the way you suggested without issues.