Core Concepts and Utilities

• comm, diff, and patch
• Linux Sysadmin Basics – 6.3 The /proc Filesystem
• Mounting / loop devices
• Mounting and unmounting filesystems
• Root filesystem / Filesystem Hierarhy Standard (FHS)
• TFTP
• U-Boot from Scratch v2019.01 edition

Hardware

• Board support package
• (long but high quality) Device Trees for Dummies
• Porting U-Boot and Linux on New ARM Boards: A Step-by-Step Guide
• Error Correction Code Implementations in Memory Controller Designs

Filesystems, Data Storage

• Explaining File Systems: NTFS, exFAT, FAT32, ext4 & More
• How Do RAM Drives Work?
• How does Flash Memory work?
• Introduction to MTD memory in Linux (flash)
• Linux Kernel and Initrd Basics Tutorial
• mount, umount, fdisk, mkfs, Linux Commands mount, umount, fdisk & mkfs
• RAMFS vs TMPFS
• What is DRAM? How is it Different From SRAM?
• Linux: and the SQUASHFS

C, C++, Compilers, Development tools

• Anatomy of Cross-Compilation Toolchains
• Building Tool chain with Crosstool-NG
• Debugging with Core Dumps
• Spying on Running Programs (strace, ltrace, system calls vs function calls)
• How to Inspect Compiled Binaries (binutils, objdump)
• Finding memory errors with Valgrind
• POSIX message queues in Linux
• NCurses tutorial
• How to use autotools (automake, autoconf, aclocal, autoheader)
• Cross Debugging with GDB: Embedded Linux
• Use readelf to View Program Headers
• C Programming in Linux Tutorial #071 - fsync() Function
• Build a Linux loadable kernel module that Rickrolls people
• C Programming in Linux Tutorial #041 - Static Shared Libraries

Booting, Boot loaders, Kernels

• BIOS and UEFI As Fast As Possible
• Buildroot: building embedded Linux systems made easy!
• Linux boot process / GRUB
• Linux initramfs for fun, and, uh…
• Understanding the Initramfs
• What is ACPI?
• GRUB tutorial
• Syslinux bootloader
• modprobe, lsmod, rmmod, insmod
• Introduction to U-Boot
• CMake Tutorial EP 1 | Understanding The Basics

Init Systems

• Init, Systemd, and Upstart
• Linux Networking using NFS

System Administration, Services, Tools

• Chrony Time Server Configuration and Understanding
• RSync
• Udev in Linux
• Linux uname command summary with examples
• Basics of Busybox and how to run a Busybox HTTPD web server
• Using dmesg to read the kernel ring buffer
• ifconfig command
• Understanding sysfs, udev, dbus
• OS hacking: mknod() syscall and /bin/mknod
• How to Install and Configure Dropbear for Linux!
• Controlling USB devices with Python and libusb @siliconlabs
• creating archives with CPIO
• uClibc Today: Still Makes Sense