The kernel primitives, init systems, and tooling behind the world's most-deployed OS.
A storage-accurate explanation of Btrfs extents, subvolumes, snapshots, reflinks, checksums, free-space behavior, consistency, and backup boundaries.
A recovery-first Linux boot workflow for root-device failures covering identifiers, storage drivers, LUKS, LVM, Btrfs, regenerated initramfs, and rollback.
A forensic workflow for Linux inotify exhaustion: identify watch owners, distinguish instances and queue overflow, reduce scope, size limits, and retest.
A safe nmcli workflow for connection profiles, static addressing, DNS, routes, staged activation, rollback, and proof that settings survive reboot.
A practical systemd credentials workflow using LoadCredential, encrypted credentials, service access, rotation, permissions, and failure-safe verification.
A distribution-aware UKI workflow covering kernel, initrd, command line, os-release, Secure Boot signing, inspection, rollout, and rollback verification.
How Linux livepatch redirects functions, moves tasks into a consistent patched state, exposes transitions, and fits into—not replaces—kernel maintenance.
A version-aware explanation of Linux Landlock rulesets, handled rights, parent-directory policy, process inheritance, probing, and safe fallback behavior.
A practical reading of Linux PSI totals, some/full averages, cgroup scope, polling triggers, workload correlation, and capacity decisions without guesswork.
A precise guide to Linux seccomp-BPF actions, filter layering, argument limits, no_new_privs, observability, and the controls a real sandbox still needs.