It's a system admin tip that's valuable in proportion to the number of Ubuntu VM images you have running. For some folks here, that's quite a few. Note that in

It's a system admin tip that's valuable in proportion to the number of Ubuntu VM images you have running. For some folks here, that's quite a few. Note that in Erratasec's case, they need to have a diversity of VMs for real hacking. Go check out the the Ubertooth One mentioned in the article, it's badass. In my case, I was just going to be installing one in the next few days and was looking for ways to reduce drive space used on my SSD.