Установите Snap Change в прогрессе Ubuntu
$ snap changes
...
123 Doing 2018-04-28T10:40:11Z - Install "foo" snap
...
$ sudo snap abort [ID]
icy_milktea27
$ snap changes
...
123 Doing 2018-04-28T10:40:11Z - Install "foo" snap
...
$ sudo snap abort [ID]
>>> snap changes
>>> sudo snap abort [number ID]