Chains
Java web jars provide static resources for web projects, it supports very good integration with maven (or gradle) by creating overlays that can be unzipped and used inside war. Maven war plugin makes this drop-dead simple.
My quick usage notes on tcpdump utility for capturing network traffic.
OSX and unix like systems use pf instead of iptables and tc. Here are my frequently used commands.
Some terse syntax of for loops in JavaScript.