Linux Kernel Modules That Explain How Podman Really Works

Short summary

A hands-on tutorial showing how to build and run three Linux kernel modules on a disposable Ubuntu VM via Killercoda, illustrating kernel debug messages, character devices, and the relationship between kernel-level process info and Podman containers. The walkthrough covers installing kernel headers, compiling modules with make, loading them with insmod/rmmod, and using dmesg to observe kernel output, then connects kernel process tables to Podman's daemonless container model.

• •Three kernel modules demonstrate debug messages, character devices, and kernel-to-container process relationships
• •Uses Killercoda's disposable Ubuntu VM with Podman as the container engine
• •Covers the full workflow: dependency installation, compilation, loading, and observation via dmesg

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