Ban666

I know what this does, but what does it overwrite the free space with? In other words, will it fill up the free space on my HDD rendering it useless? Or will that space still be available after its been wiped?

I am using VirtualBox. See here: https://www.virtualbox.org/manual/ch10.html#vboxconfigdata Will running CCleaner or bleachbit for Linux clean these machines?

Hi, I have a few different virtual machines I use to run a few different Linux distros. If I run CCleaner on the host, will that clean cache, temp files, etc from the VM's or do I have to use CCleaner within the vm's? In other words, does vm's store temp data on the host?