Among October's receive and transmit, the following links are recommended reading:

• Sun Microsystems: A Look Back at a Tech Company Ahead of its Time [8 min]
• First Principles: Elon Musk on the Power of Thinking for Yourself [7 min]
• -2000 Lines Of Code [1 min]
• MacPaint and QuickDraw Source Code [4 min]
• Celebrating 50 Years of Unix [4 min]
• UNIX History and Timeline [5 min]
• More on FreeBSD Refcount Overflows [8 min]
• OpenBSD Is C Documentation [3 min]
• The Lines of Code That Changed Everything [27 min]
• Bel: Paul Graham's new Lisp dialect [1 min]
• The UNIX Game [variadic]

UPDATE: netcalc has a newer version available.

tl;dr: download netcalc—an IPv4 and IPv6 subnet calculator—to make subnetting easier.

In one of my Computer Science units last year we studied subnetting. It was really interesting but also highly programmatic. So like any good CS student, when faced with a repetitive problem to solve—such as calculating subnets—you automate the process; which I did! I first wrote a program in Python but then decided to create one in C. It only provided IPv4 functionality, though, as that's all we worked on at university. More recently, however, I thought I'd expand …