Can't purge Snap package
When entering
sudo snap --purge libreoffice
I'm getting error: unknown flagpurge'`
Solution 1:
You can do
snap remove --purge libreoffice
This will Remove the snap without saving a snapshot of its data according to the man page of snap
Solution 2:
The --purge-option is used in addition to the remove-command. To remove` a snap without saving a snapshot of it's data use:
sudo snap remove --purge libreoffice
Please take a look at man snap to see which commands and options can be used with snap.