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Reddit Issuing 'Formal Legal Demands' Against Researchers Who Conducted Secret AI Experiment on Users

3 weeks 5 days ago
An anonymous reader shares a report: Reddit's top lawyer, Ben Lee, said the company is considering legal action against researchers from the University of Zurich who ran what he called an "improper and highly unethical experiment" by surreptitiously deploying AI chatbots in a popular debate subreddit. The University of Zurich told 404 Media that the experiment results will not be published and said the university is investigating how the research was conducted. As we reported Monday, researchers at the University of Zurich ran an "unauthorized" and secret experiment on Reddit users in the r/changemyview subreddit in which dozens of AI bots engaged in debates with users about controversial issues. In some cases, the bots generated responses which claimed they were rape survivors, worked with trauma patients, or were Black people who were opposed to the Black Lives Matter movement. The researchers used a separate AI to mine the posting history of the people they were responding to in an attempt to determine personal details about them that they believed would make their bots more effective, such as their age, race, gender, location, and political beliefs.

Read more of this story at Slashdot.

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Linux Data Recovery: How to Salvage Lost or Corrupted Files

3 weeks 5 days ago
by George Whittaker

Data loss is a nightmare for any computer user, and Linux users are no exception. Despite the robust architecture of Linux operating systems, disasters can strike in the form of accidental deletions, corrupted partitions, or failing storage devices. Whether you're a system administrator, developer, or everyday Linux user, understanding how to recover data can be the difference between a minor inconvenience and a major setback.

This guide will walk you through the practical strategies and essential tools for recovering lost or corrupted files on Linux.

Understanding Data Loss on Linux Common Causes of Data Loss

Data loss can occur for various reasons:

  • Accidental Deletion: Files removed with rm or cleared trash.

  • Filesystem Corruption: Caused by improper shutdowns, power failures, or software bugs.

  • Partition Issues: Misconfigured or overwritten partition tables.

  • Hardware Failures: Hard drive degradation, bad sectors, or failing SSDs.

How Deletion Works on Linux

Linux filesystems like ext4 don’t immediately erase data when a file is deleted. Instead, the filesystem marks the file's space as free. Until that space is overwritten, the data may be recoverable. This behavior is the cornerstone of most recovery techniques.

First Steps After Data Loss

The most critical step is to minimize system activity on the affected drive. Any write operation can potentially overwrite recoverable data.

Disconnect and Mount Read-Only

If the loss happened on a secondary drive, physically disconnect it and mount it read-only on another machine:

sudo mount -o ro /dev/sdX1 /mnt/recovery

Create a Disk Image

Use tools like dd or ddrescue to create a complete image of the drive for analysis:

sudo dd if=/dev/sdX of=/mnt/external/backup.img bs=4M status=progress

Or with ddrescue, which handles read errors more gracefully:

sudo ddrescue /dev/sdX /mnt/external/recovery.img /mnt/external/logfile

Work from the image to preserve the original drive.

Boot from a Live Environment

To avoid using the target system, boot into a Live Linux distribution like:

  • SystemRescueCD – tailored for system repair.

  • Ubuntu Live CD – user-friendly and widely available.

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George Whittaker