Linux Kernel
Reference for working with the Linux kernel: module management, boot parameters, sysctl tuning, GRUB configuration, and kernel debugging.
Production-Grade Terraform Infrastructure
Building production-grade Terraform: small modules, precondition/postcondition validation, provisioners, null_resource, and external data sources.
Terraform Modules
Building reusable Terraform modules: inputs, outputs, module sources (local, Git), file layout conventions, versioning, and composing infrastructure from modules.