Node.js Netstat Utility

node-netstat is a JavaScript utility library designed to programmatically read and parse `netstat` data on various operating systems. It is currently at version 1.9.0 and provides a callback-based API for processing network connection information line by line. The library supports filtering results by properties like PID or protocol and offers both synchronous and asynchronous execution. Key differentiators include its cross-platform compatibility (tested on Ubuntu 14.04/16.04, Windows 7, and OS X Yosemite), extensibility via custom parsers and filters, and the ability to cancel ongoing `watch` operations. While `netstat` itself is considered obsolete on some Linux systems in favor of `ss`, node-netstat provides a unified interface for accessing this data where available, making it suitable for system monitoring and debugging tools in Node.js environments.