I've been working on a LAMP server in a virtual machine with Ubuntu 12.04 LTS that I downloaded from VirtualBoxImages.com. It had a virtual disk image of about 1.8 GB. I back it up regularly.
A few days ago I was working on the PHP code when the server suddenly stopped working. I verified it and found out it started some "unattended-upgrades" by itself.
"Ok, for safety/performance's sake, let it do it." I thought. When it finished I went back to work on my server.
Alas, today I noticed it increased the virtual disk space from 1.8 GB to 3.0 GB... I'm sure it wasn't me because I didn't install any software at all. Worst of it, without noticing, I already backed it up like that...
One of the goals of this virtual machine is to have the smallest size possible. How can I revert this mess these "unwanted-upgrades" put me in?