I gave a job candidate a short coding test using a guest session on a Laptop with Ubuntu. When I opened the guest session I saw the message:

"All data created during this guest session will be deleted when you log out"

After the interview I closed the lid of the laptop to transport it to another room. I did not explicitly log out. When I opened the lid, of course, it had logged me out of my session destroying all the data. Great.

  1. This is bug, right? Unless the user expressly logs out or switches session, it shouldn't destroy data.

  2. How can I recover any data from the hard disk?

  • 1
    Your data did most likely not even get written to the disk at any time (at most to the swap space), as described here. All guest files are stored in a tmpfs file system located in your RAM. I'm sorry, but you're out of luck today. – Byte Commander Apr 26 '16 at 10:23
  • 1
    In the guest session, the automatic locking, which is enabled by default in ordinary sessions, is disabled. I can't tell if that disabling is supposed to be effective also when you close the lid. You may want to file a lightdm bug. – Gunnar Hjalmarsson Apr 26 '16 at 15:45
  • I created a bug report on Launchpad bugs.launchpad.net/ubuntu/+bug/1575156 – Adam Apr 27 '16 at 8:46

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