What is logmon?

Logmon is a tool that lets you watch log files update live in your web browser. Instead of SSHing into a server and running a command like tail -f to see new log lines as they arrive, you get a simple web page that streams those lines in real time. The project has two main parts working together. On the backend, it reads a log file continuously and watches for new lines being written to it. Those lines get pushed to a middleman service called Juggernaut, which then forwards them to the frontend web page. The result is that every time a new line appears in your log file, it instantly shows up in the browser without you needing to refresh the page. The web interface is built with Flask, a lightweight Python web framework. This would appeal to someone running a web application who wants to keep an eye on server activity, errors, or traffic patterns without constantly switching to a terminal. For example, if you run a website and want to watch incoming requests or spot errors as they happen, you could point this tool at your web server's log file and have a live dashboard open in a browser tab. It's a convenience tool for monitoring rather than a full log management platform. One thing worth noting is that the project is fairly old and depends on Juggernaut, a realtime push library that has since been deprecated. The README also spends significant time addressing a practical pain point: when log files get rotated (renamed and replaced as part of routine maintenance), the tool stops working unless you configure your system to notify it. The fix involves modifying system-level log rotation settings and tweaking the runner script to handle that signal, which adds some setup complexity for production use.