During installation of Ubuntu 18.04 I created a separate partition /store. Files are accessible, but I cannot open files on it with okular and GIMP. No exact errors are displayed, okular just says Could not open file:///store/1.pdf. GIMP says: Opening '/store/2.jpg' failed:Could not open '/store/2.jpg' for reading: No such file or directory

However other programs, such as chrome, document viewer, kolourpaint read pdf, jpg files perfectly.

When inside okular/GIMP I click file->open, /store is not displayed among other folders. Neither symbolic link to it, residing in ~/Desktop is displayed.

What can be the solution?


Removing the snap and reverting to the regular APT version, if available, indeed works around the permission limits of a Snap.

In case you do not have that alternative or prefer the snap version, you may want to check the permissions in Software. Opening the permission "Read/write files on removable storage" will grant the snap application access to media mounted under /media or /mnt. The snap package has to provide that interface for this to work. See this Ask Ubuntu question and the snap documentation.


It turned out to be the limitation of installing programs with snap: it makes only files from home folder accessible. So the solution is to remove okular and gimp from snap and install using apt:

# okular
sudo snap remove okular
sudo apt install okular

# gimp
sudo snap remove gimp
sudo add-apt-repository ppa:otto-kesselgulasch/gimp 
sudo apt-get update
sudo apt-get install gimp # without 2 previous lines gimp 2.8 will be installed

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