Since (most likely - because it worked on 18.10 last time I intentionally checked) updating to Ubuntu 19.04 I cannot get snap to work. Some of my software was updated automatically via snap, but it doesn't any longer.

Whenever I try to run update a software in the Ubuntu Software it prompts the error message

error: system does not fully support snapd: cannot mount squashfs image using "squashfs": exec:
    "mount": executable file not found in $PATH

Same message pops up when I run snap refresh in the command line. I tried to add /snap/bin to the path, but to no avail.

For further information: I'm running a oh-my-zsh terminal and the path is currently configured in /etc/environment.

Edit: Re-installing snapd:

apt install snapd
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
gyp javascript-common libjs-inherits libjs-is-typedarray libnode-dev libssl-dev libuv1-dev
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed:
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 13,4 MB of archives.
After this operation, 65,5 MB of additional disk space will be used.
Get:1 http://at.archive.ubuntu.com/ubuntu disco/main amd64 snapd amd64 2.38+19.04 [13,4 MB]
Fetched 13,4 MB in 0s (47,1 MB/s)
Selecting previously unselected package snapd.
(Reading database ... 175145 files and directories currently installed.)
Preparing to unpack .../snapd_2.38+19.04_amd64.deb ...
Unpacking snapd (2.38+19.04) ...
Setting up snapd (2.38+19.04) ...
md5sum: /etc/apparmor.d/usr.lib.snapd.snap-confine: No such file or directory
snapd.failure.service is a disabled or a static unit, not starting it.
snapd.snap-repair.service is a disabled or a static unit, not starting it.
Processing triggers for desktop-file-utils (0.23-4ubuntu1) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for gnome-menus (3.32.0-1ubuntu1) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...

I suppose this No such file or directory messages aren't exactly helping in my case.

  • 1
    Try reinstalling the snapd package (using apt). If it fails, please copy-and-paste the entire output into your question. – user535733 May 15 '19 at 12:15
  • @user535733 Thanks, I've tried re-installing snapd, see edit - hasn't changed anything so far. :) – LordAnomander May 15 '19 at 12:54
  • The no such file or directory message seems irrelevant. That file is not on my 19.04 test system either, yet snap works properly. – user535733 May 15 '19 at 13:15

TLDR; To fix, create /etc/environment.d/, set the path in a configuration file there, and reboot:

sudo mkdir /etc/environment.d
sudo echo -e "PATH="/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/snap/bin"\nXDG_DATA_DIRS="/usr/local/share:/usr/share:/var/lib/snapd/desktop"" > /etc/environment.d/60-snap-icons-and-bin.conf
sudo reboot now 

I had the same problem on Ubuntu 18.04.02 LTS aka bionic, kernel 4.15.0-50. My snap was working but I couldn't look at logs, switch channels, save snapshots, or manage services:

error: system does not fully support snapd: cannot mount squashfs image using "squashfs": exec:
   "mount": executable file not found in $PATH

Turned out the problem has nothing to do with squashfs; I eventually found evidence it had to be an environment problem:

error: cannot get logs: exec: "journalctl": executable file not found in $PATH

The squashfs mounts are present:

/var/lib/snapd/snaps/core_0000.snap on /snap/core/0000 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/nextcloud_11111.snap on /snap/nextcloud/11111 type squashfs (ro,nodev,relatime,x-gdu.hide)

I had set /etc/environment this way:


Couldn't see how that wouldn't be working, so I ruled out problems with seccomp or apparmor, modules, missing packages, or snap configuration files.

When I'd almost concluded that I was one of two people in the world having this problem, I hit upon an old post about snap desktop apps; I modified the solution to fit. Probably there are other ways to make the environment work - see environment.d manual. The system sources environment variables from very different files depending on what kind of shell you're in, or if you're in one at all.

sudo mkdir /etc/environment.d
sudo echo -e "PATH="/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/snap/bin"\nXDG_DATA_DIRS="/usr/local/share:/usr/share:/var/lib/snapd/desktop"" > /etc/environment.d/60-snap-icons-and-bin.conf
sudo reboot now
  • 1
    Thanks, I totally forgot about my question. This is the right answer - if snap stopped working there is something wrong with your path. In my case, I haven't set the paths correctly in /etc/environment and fixing them fixed snap. – LordAnomander Jun 3 '19 at 8:35
  • Thank you. After researching and trying several fixes this is the only one that actually solved it for me. In my case was with Hyper-V and both Ubuntu 18.04.2 LTS and also 19.04 – kerzek Aug 22 '19 at 23:53

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