I am running Ubuntu 16.10 with
snapd and the basic
core snap installed since it was released.
After some time I observed that the
/snap/core directory fills up with multiple older versions.
To remove them I'll have to execute
sudo snap remove core --revision <number> manually.
Multiple versions of snaps & garbage collection section in Snaps and snapcraft documentation explains that after every update of a snap package the current version and the one before are installed and older versions are getting automatically removed (just as it was earlier the case).
As I cannot find further information in
snap help, I am asking whether there is a setting or a switch command in
snapd to enable automatic removal of those older
core snap packages.
Additional information : What I described is valid for 3 machines with the same configuration.