Writings

Internet: Under the Covers - Understanding and debugging some common protocols used on the internet
Tor Considered Harmful - On the social irresponsibility of tor and other generic anonymising networks
The Best Program is a rich API - On the importance of scriptability and APIs
A brief Perl tutorial that I wrote many years ago
A brief screen tutorial also written many years ago
Bag of Tricks - Good Tools for Computer Geeks

Possibly interesting old usenet posts