Hacker News on 28 December 2018

• Things I Don’t Know as of 2018
• Crypto 101 – Introductory course on cryptography
• Fish shell 3.0
• 911 emergency services go down across the US after CenturyLink outage
• What Happens to Kid Culture When Streets Are Closed to Cars
• Teachers Quit Jobs at Highest Rate on Record
• SSH Examples, Tips and Tunnels
• Best Paper Awards in Computer Science since 1996
• Show HN: Open source JavaScript library to record and replay the web
• “Modern” C++ Lamentations