Mount a shared VirtualBox folder on startup in Ubuntu.
sudo vim /etc/rc.local
sharename="MySharedFolder"
sudo mount -t vboxsf -o uid=1000,gid=1000 $sharename /mnt/$sharename
Type mount to view the mount at /mnt/MySharedFolder.
Hint: don't use rc.local for gui applications on startup
Posted Dec 20, 2015.
https://www.darklaunch.com/2015/12/20/ubuntu-mount-a-virtualbox-folder-on-startup.html