Practical Linux Driver Basics: Kernel Modules and Character Devices

Linux driver work is where product stability can fail fast: kernel code runs in privileged context, and small mistakes can trigger oops messages or kernel panic. Apriorit’s tutorial walks through building a minimal loadable kernel module and character device (Linux kernel 6.14+), covering kernel logging, file_operations callbacks, /dev interaction, and safe user-space memory access. It also explains why LKM-based delivery enables updates without recompiling the whole kernel. CTOs and platform leaders can use this as a reference design for driver scaffolding and for assessing kernel-level engineering maturity in teams or partners.