So you want to build an embedded Linux system?

This article is targeted at embedded engineers who are familiar with microcontrollers but not with microprocessors or Linux, so I wanted to put together something with a quick primer on why you’d want to run embedded Linux, a broad overview of what’s involved in designing around application processors, and then a dive into some specific parts you should check out — and others you should avoid — for entry-level embedded Linux systems.
↫ Jay Carlson

Quite the detailed guide about embedded Linux.