Hacker News on 27 January 2012

• Understanding the bin, sbin, usr/bin , usr/sbin split
• How Much Is an Astronaut's Life Worth?
• What I Learned From Opening a Bookstore
• Facebook to File for IPO Next Week
• This is what 864GB of RAM looks like now
• Graphene: The perfect water filter
• How I Develop Things and Why
• Coding Horror: Separating Programming Sheep from Non-Programming Goats
• Show HN: SocialFolders, "Dropbox for social"
• How I Learned Enough Ruby On Rails In 12 Weeks To Launch Freelancify