This morning I switched on the PC booted my notebook and launched the VM to do another set of experiments inside it, however it seemed it failed to load all services printed in text on Linux boot and the GDM3 Greater never appearead on screen- for those who don't know GDM3 is Linux Graphical environment Authentication / Login program. related etc.) immediately, shutdown the Virtual Machine running (even of this very moment) on my Thinkpad T420 notebook and went to bed. I didn't realized immediately the 'No free disk space' error was there because, after installing a few sets of Debian packages ( Exim MTA – exim4-damon-heavy. Recently I installed Debian 9 in a hurry (without much taking attention on the configuration options during VM machine creation) and the negative results of my lack of attention came quickly as my Linux Virtualbox guest OS just ran of space a little time after I have installed a Debian Stretch 9 OS into the virtual machine. I am using Oracle VirtualBox virtual machine to experiment with things before I deploy them on my servers.

Oracle virtualbox resize vdi