I have a TurnKey Linux installation (Ubuntu 8.04) with a multisite Drupal instance running on it. I rebooted the server today, and when it came back up, everything that had been put on there since July 2010 had disappeared. Since the server is for test sites, it had never been added to our company's backup schedule, so we have no backups on other servers. Is there any chance that the server would have backed up the files somewhere or is there a way to revert it to the state it was in yesterday? A few people put a lot of work into one of the sites and I would hate to see their work go to waste. Thanks in advance for any tips anyone might have.