Build From Source (6)

• RPM Packaging Guide (rpm-packaging-guide.github.io) tutorial
  writing spec files and building RPMs, from no packaging background through advanced cases; free
  Package Manager RPM #
• Handbook:Main Page - Gentoo wiki (wiki.gentoo.org) reference
  install and base-administration manual for a source-based distro: Portage, OpenRC, many CPU arches
  Gentoo Package Manager System Administration #
• About Gentoo – Gentoo Linux (gentoo.org) reference
  Source-based metadistribution compiled and tuned per machine via Portage; elected council governance
  Distro Gentoo #
• The Linux Kernel Archives (kernel.org) reference
  Official mainline, stable and longterm source tarballs with PGP signatures, git trees and mirrors
  Kernel #
• Gentoo Wiki (wiki.gentoo.org) reference
  Community-editable docs hub: handbooks, portage and project pages for installing and running Gentoo
  Distro Gentoo #
• Welcome to Linux From Scratch! (linuxfromscratch.org) reference
  book set for building a system from source: base LFS plus beyond, automated, multilib and gaming variants
  Distro Kernel #