Hacker News on 18 May 2015

• Fish shell
• What one may find in robots.txt
• Deus Ex: Human Revolution – Graphics Study
• Thoughtcrime
• Top data mining algorithms in plain English
• Introducing Preemptible VMs
• CEO Wanted University Scientists Dismissed Over Link Between Fracking and Quakes
• A Few Useful Things to Know about Machine Learning [pdf]
• Hello, World
• Using BitTorrent with Amazon S3