On most up-to-date Ubuntu flavours that I install in VMs in Virtual Box when I choose the option to Insert Guest Additions CD image...
I am shortly asked if I wish to run what is one there, and when I choose to do so a Terminal windows opens up which installs it.
However on Lubuntu this is not the case, it just asks me if I would like to open it with the file manager, and then even though there are executable files in there, executing them doesn't seem to do much good, so how do I install it on Lubuntu and why doesn't it just act like the rest of the Ubuntu flavours and offer to immediately run it for me?
I have tried this in both Lubuntu 14.04.4 LTS and 15.10 (though I currently have 15.10 in the VM). And I am running the latest version of Virtual Box.