I understand that for instance on a Windows system that when you delete a file that in fact it is not deleted as such immediately, but that the file is just marked meaning that other files can override it. This means then that some deleted files can then be recovered after their deletion.
Is there a similar system on Ubuntu? And if so is there a way to get it so that the deleted files, before their actual deletion, are encrypted or something so that if they are recovered then they cannot be read?
I am running Ubuntu 14.10.