I almost put the OpenSSH stuff in In Other BSDs yesterday, but it is really cross-platform at this point.

• A fun optimization trick from rsync followed by More about auto-generated switch-cases.
• Design Rules, Volume 2: How Technology Shapes Organizations: 
  Chapter 14 Introducing Open Platforms and Business Ecosystems.  From Harvard Business School, so different from the usual open source discussion.  (PDF, via).
• Unix in East Germany (GDR).  (via)
• ‘Scraper’ bots and the secret Internet arms race.  (via)
• Exploring OmniOS in a VM (2/2).
• “OpenSSH has broader key revocation than I thought“.
• OpenSSH Principals.  OpenSSH cert authorities and revocation; good ideas.  (via)
• How to Make a Roguelike.  (via)
• A Model M with 5 functions per key.
• d100 Mutations.