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Contents not displaying for Shared Folders on a Fedora 32 guest instance in VirtualBox

Published on 26th July 2020 Estimated Reading Time: 2 minutes

While some Linux distros like Fedora install VirtualBox drivers during installation time, I prefer to install the VirtualBox Guest Additions themselves. Before doing this, it is best to remove the virtualbox-guest-additions package from Fedora to avoid conflicts. After that, execute the following command to ensure that all prerequisites for the VirtualBox Guest Additions are in place before mounting the VirtualBox Guest Additions ISO image and installing from there:

sudo dnf -y install gcc automake make kernel-headers dkms bzip2 libxcrypt-compat kernel-devel perl

During the installation, you may encounter a message like the following:

ValueError: File context for /opt/VBoxGuestAdditions-<VERSION>/other/mount.vboxsf already defined

This is generated by SELinux, so the following commands need to be executed before repeating the installation of VirtualBox Guest Additions:

sudo semanage fcontext -d /opt/VBoxGuestAdditions-<VERSION>/other/mount.vboxsf
sudo restorecon /opt/VBoxGuestAdditions-<VERSION>/other/mount.vboxsf

Without doing the above step and fixing the preceding error message, I had an issue with mounting of Shared Folders whereby the mount point was set up, but no folder contents were displayed. This happened even when my user account was added to the vboxsf group, and it proved to be the SELinux context issue that was the cause.

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