Debootstrapping Embedded Linux Root Filesystems - Building and Optimization for the...
summary
Step-by-step guide to producing a Debian/Ubuntu embedded rootfs using debootstrap and cross-debootstrap, including how package caches and apt lists inflate images and where to delete them; shows real size differences like 215 MB vs 311 MB and surprising 10 MB variance across builds, and explains using qemu-user/binfmt for cross-architecture chroots, choosing init (systemd vs busybox/openrc) and kernel module strategies for tiny flash targets, plus offline reproducible builds and the forthcoming distro builder at https://github.com/ronpscg/PscgBuildOS.
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chapters (15)
- 0:00Introduction
- 1:06Why embedded Linux challenges
- 7:09Debian root filesystem basics
- 15:01Bootstrap tool tradeoffs
- 22:49Minimal Debian root filesystem
- 33:15Storage cache optimization
- 43:16Reproducible builds security
- 53:16Preparing root filesystem
- 1:00:03Yocto vs Buildroot comparison
- 1:03:56Init frameworks kernel modules
- 1:11:41Networking system recipes
- 1:25:55Debugging on QEMU
- 1:33:01Offline builds cache
- 1:37:23Future work PG Builders
- 1:44:29Q&A
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