Built My Own "mini Docker" Using Just Bash Scripts Using Only Linux Tools
Posted3 months ago
github.comTechstory
calmpositive
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LinuxContainerizationBash Scripting
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The author built a simplified containerization system using Bash scripts and Linux tools, sparking interest in the HN community, albeit with limited discussion.
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Oct 15, 2025 at 3:28 AM EDT
3 months ago
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I’ve been diving deep into how Docker actually works under the hood — namespaces, cgroups, chroot, virtual Ethernet pairs, etc. To really understand it, I wrote my own container runtime from scratch using only Bash and standard Linux utilities.
It can:
Create isolated filesystem environments (via chroot)
Set up PID, UTS, and network namespaces
Connect containers using virtual Ethernet pairs
Run simple Nodejs app inside this container Allot cgroups to this process This project helped me understand how containerization works without any abstraction layer — just pure Linux fundamentals.
Repo: github.com/Cloudmash333/container-from-scratch