Oh, and if you’re wondering how likely it is that the data is still in place after you delete it, the answer is that it’s very hard to say. As long as you’re lucky enough to deploy the tool before the data gets overwritten by something else, there is a very decent chance that you’ll be able to undelete the deleted data. That’s essentially how undelete tools work in Ubuntu: They cruise around your file system, looking for signs of data that has been removed from the file system journal but that remains intact on the disk itself. If you were to go and drive around the neighborhood, you’d be able to find the “deleted” building easily enough, unless someone has already built over it. The building remains there until someone comes and builds a new building in its place. So, deleting a file is like crossing an address out of your address book without actually demolishing the building to which it corresponds. The data stays in place until some other data comes and overwrites it. The interesting thing, however, is that deleting the file from your journal doesn’t actually remove the data from the disk itself. When you delete a file on Linux, it’s like removing the entry for that file from your address book. To use an analogy here, you can think of your file system as a neighborhood, and the journal as an address book.
A journaling file system is so-named because it keeps a “journal” of which files are stored in which parts of your disks. How File Undeletion Works in Ubuntuįirst, let’s discuss why and how it’s possible to undelete files in Ubuntu.īy default, most Linux-based operating systems, including Ubuntu, use journaling file systems, such as ext4.
#TESTDISK RECOVER DELETED FILES HOW TO#
We’ll explain how to undelete files in Ubuntu as an example, although the tools and methods should work on any mainstream Linux distribution. In this article, we look at three such tools that you can use to undelete files on Linux. It’s an unwritten law of the universe that, no matter how often you back up your data and how careful you are not to delete sensitive files by mistake, sooner or later you’ll find yourself in a situation where you lose data that was not backed up.įortunately, the universe offers solutions to this problem in the form of undelete tools. Have you ever found yourself wishing you could bring a deleted file back from the dead? If not, then you haven’t worked in IT very long.
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