Linux: The Complete Mental Model – How the Linux Kernel Works | DevOps Daily Dose Podcast

Ever SSH'd into a sluggish server at 3 AM and realised memorizing ls and top isn't enough? This deep-dive audio podcast builds a complete mental model of Linux under the hood — from the moment you press the power button (UEFI, GRUB, initramfs, systemd) through the VFS, inodes and the filesystem hierarchy, process identity and signals, the CFS scheduler, virtual memory and the OOM killer, /proc and /sys, all the way to the namespaces and cgroups that power every container. Who it's for: developers, DevOps/SRE engineers, sysadmins and students — beginners through interview level — who use Linux every day but want to truly understand what the kernel is doing, so you can debug any server with confidence. Chapters: 00:00 Intro 00:14 Why memorizing commands isn't enough 01:53 Power on: UEFI/BIOS, MBR & GRUB 04:56 The initramfs paradox & pivot_root 07:47 PID 1: systemd, parallel boot & targets 10:16 The VFS: one interface for every filesystem 11:52 Dentries, inodes, hard links & why rm "unlinks" 14:28 FHS: /usr vs /var, /bin vs /sbin, /etc & /dev 19:20 Process identity: real, effective, saved & fs UIDs 23:24 Signals: dispositions, SIGKILL & real-time signals 27:57 CPU scheduling: CFS, vruntime, nice & real-time policies 37:34 Virtual memory: page tables, TLB & huge pages 41:16 Page cache, kswapd, swap & the OOM killer 45:35 /proc & /sys: peeking into the kernel (the iowait myth) 51:14 Containers: namespaces & cgroups v2 59:29 Recap: the five-layer mental model & final thought 63:56 Outro Built from the official Linux documentation (kernel.org, the man-pages project, systemd/freedesktop.org, GNU, and the Filesystem Hierarchy Standard). 🎧 Plug in your headphones and listen & learn. If this helped, subscribe to @DevOpsDailyDose and hit the bell for more deep dives! #Linux #LinuxKernel #DevOps #SRE #Podcast