First the caveat: I understand that this question involves Mate and a Raspberry Pi so if you consider it outside the realm of this forum just ignore it. But on the chance that it may be helpful or typical of something involving snaps or that platform, here goes.
I decided to try and install the nextcloud snap. It threw a ton of errors and seemed to freeze in the middle of the process (for over an hour). I killed it and just decided to try and remove it. The install looked like….
$ sudo snap install nextcloud
2016-06-24T08:48:29-04:00 ERROR cannot setup apparmor for snap "nextcloud": cannot load apparmor profile "snap.nextcloud.apache": cannot load apparmor profile: exit status 1
apparmor_parser output:
Cache read/write disabled: interface file missing. (Kernel needs AppArmor 2.4 compatibility patch.)
Warning: unable to find a suitable fs in /proc/mounts, is it mounted?
Use --subdomainfs to override.
2016-06-24T08:53:29-04:00 ERROR cannot setup apparmor for snap "nextcloud": cannot load apparmor profile "snap.nextcloud.apache": cannot load apparmor profile: exit status 1
apparmor_parser output:
Cache read/write disabled: interface file missing. (Kernel needs AppArmor 2.4 compatibility patch.)
Warning: unable to find a suitable fs in /proc/mounts, is it mounted?
Use --subdomainfs to override.
[|] Setup snap "nextcloud" security profiles
When I try snap remove nextcloud I get
error: cannot remove "nextcloud": snap "nextcloud" has changes in progress
What I would primarily like to do is properly remove the snap and recover the space from the partition it created. If partition is the correct term??
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 46.6M 0 loop /snap/ubuntu-core/120
loop1 7:1 0 113.9M 0 loop /snap/nextcloud/12
mmcblk0 179:0 0 14.9G 0 disk
├─mmcblk0p1 179:1 0 64M 0 part /boot
└─mmcblk0p2 179:2 0 14.8G 0 part /
I tried
snap abort nextcloud
and got
error: cannot find change with id "nextcloud"
I should also note that it doesn't show up as installed as I get only the following
$ snap list
Name Version Rev Developer Notes
ubuntu-core 16.04+20160531.12-01 120 canonical –
Though it does show up in….
$ snap interfaces
:network nextcloud
:network-bind nextcloud
I tried
$ snap changes
ID Status Spawn Ready Summary
1 Doing 2016-06-24T12:39:20Z - Install "nextcloud" snap
$ sudo snap abort 1
$ snap changes
ID Status Spawn Ready Summary
1 Abort 2016-06-24T12:39:20Z - Install "nextcloud" snap
But the partition is still there.
** Update, I ran the entire process again for debugging purposes and just let it sit after the "snap abort 1" command. At some point something seems to have completed in the background because lsblk shows nothing and the snap interfaces query shows nothing.
Best Answer
The
snapcommand is actually made up of two components, server and client. You're interacting with the client. When you cancelled the install operation on the client side that's the only place you cancelled it-- the client. So it stopped showing you that it was installing, but it was still installing (this is a bug). (Update: This bug was fixed in snapd v2.20.1.)On the server side, all of this stuff is happening in "changes." You can read more about them here, but for your purposes, you want to just abort this specific change. To do that, run:
Note the ID, 203, and the fact that it's "Doing" it right now. To abort that operation, you use the change ID:
And the change should stop. However, I must say that the fact that the change froze partway through does not bode well for your ability to abort it. If it doesn't work, perhaps try rebooting. If that still doesn't seem to have fixed it and you're okay losing all your snaps and their data, you can completely reset the snapd state with this script.