bcicen/ctop

ctop is a command-line monitoring tool for containers that gives you a real-time dashboard similar to the classic "top" command (which shows running processes on a computer), but instead focused on containers. A container is a lightweight package that bundles an application with everything it needs to run, think of it like a self-contained box your app lives in. When you run ctop, you get a live overview of all your containers at a glance, things like how much CPU, memory, and network each one is using. You can also drill into a single container for a closer look, filter by name, sort by different metrics, view container logs, and even open a shell (command line) inside a container directly from ctop. Out of the box it connects to Docker and runC (two popular container runtimes), and support for other container systems is planned. You run it with no extra arguments needed, it picks up your existing Docker settings automatically. The tool works on Debian/Ubuntu, Arch, generic Linux, OS X, and Windows, and can also be run as a Docker container itself. You would use ctop when you're running multiple containers on your machine or server and want a quick visual snapshot of their health and resource usage without digging through individual log files or running multiple separate commands. It's written in Go, a fast and efficient programming language, so it stays lightweight even when monitoring many containers at once.