gentoo is “built from source”, but its package manager, which is wonderful, does all the heavy lifting. it’s a bare distribution, but all the customization is user space stuff. so it’s not a great way to learn “linux”, IMO. a stage3 tarball is already more of a “mini” distro.

i once sat down to go through this as a challenge, but started to get bored quickly. skipping ahead, i built bash, configured grub to init=/bin/bash, threw in coreutils, and was very thrilled to see my very own "distro" boot in under a second (not counting bios init ofcourse) on an ancient p3 box.

i think i disabled everything i could think of in the kernel (including filesystem support, which was quickly rectified) for a truly 'minimalist' experience.

it ofcourse didnt do much but it was very responsive.

LFS takes the opposite approach. You build a cross compilation toolchain, build out a full Linux file system, compile a massive number of packages… it’s almost two days of work before you even start thinking about a boot loader.

This tutorial gets straight to the heart of the matter. Get a system that boots asap and then add complexity as you discover the shortcomings.

This seems like a much better pedagogical approach for someone not sure how the kernel works or what initramfs is, etc…

That was like me in ‘98 trying to install Mandrake linux over NetBIOS with a public sftp over ISDN line… one bad block or wrong checksum stalled the whole install. Start over again. Eventually a friend of mine was kind enough to store the sftp contents to a CD as I had already parted my drive. Thankfully we had CD burners but was limited to 2x write speed due to checksum verification failures.

Running as a cloud image can be relatively easy, you only need the default drivers from the kernel and need to get your image installed.

The latter can be done by booting into another distro and kexec'ing into your own kernel and performing the Installation afterward from memory. See also nixos-anywhere for a practical implementation of this