Today I couldn't get synced (shared) folders working first time around with Vagrant and VirtualBox, which led me to creating my first Vagrant "box" AKA  base system virtual machine image based upon a VirtualBox instance.

After spending ages on a wild goose chase because I thought the issue was due to a mis-match in the VirtualBox guest additions version compared to the version of the VirtualBox client, I eventually reaslised that all I needed to do was reinstall the package 'virtualbox-guest-utils' in order to run mount with "vboxsf" as a recognised filesystem.

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