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Tutorial: Linux Kernel Modules Demystify How Podman Manages Containers

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A developer tutorial published on DEV Community walks readers through building and running three Linux kernel modules that illustrate core operating system concepts, including kernel debug messages, character devices, and process management. The guide uses a disposable Ubuntu virtual machine on Killercoda as the environment, paired with a public GitHub repository containing the module source code. Podman, a daemonless container engine, is installed and used to run containers whose processes are later observed through kernel-level tools, bridging user-space container behavior with low-level OS mechanics. The three modules progressively cover kernel ring buffer logging via dmesg, character device interaction, and inspection of the kernel process table as it relates to running Podman containers. The tutorial targets developers seeking a practical understanding of how containerization tools like Podman interact with the Linux kernel beneath the surface.

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