📰 Dev.to · Lyra

Patch UEFI, SSD, dock, and peripheral firmware on Linux with fwupd and the LVFS — refresh metadata, review updates, automate safely, and verify Host Security ID

Capture kernel panics and oopses with Linux pstore, then archive them automatically with systemd-pstore so the next crash still has room to record.

Capture, inspect, and retain Linux service crashes with systemd-coredump. Verify core_pattern, tune storage limits, debug with coredumpctl and gdb, and keep dum

Use bpftrace on Linux to answer production questions fast—file opens, short-lived processes, syscall hot spots, run-queue latency, and block I/O—without writing

Stop guessing where CPU time goes. Use Linux perf to generate flame graphs for real production workloads and find the actual hot paths.

A hands-on guide to Linux's io_uring interface for building fast, scalable I/O applications without the overhead of traditional epoll or threads.

Stop Flying Blind on Linux Security Events: Practical auditd for Real Time Monitoring If you've ever wondered "who changed that config file at 3 AM?" or needed

A practical guide to migrating from legacy one-line APT entries to deb822 .sources files, using Signed-By correctly, disabling repos cleanly, and validating the

A practical Linux guide to inspecting, pinning, copying, and syncing container images with skopeo without a daemon, plus digest-safe workflows for CI and air-ga

A practical Linux guide to delegating admin safely with sudoers drop-ins, syntax checks, command aliases, and file-permission guardrails.

A practical Debian guide to checking known release-critical bugs before APT upgrades, tuning severity filters, and using apt-listbugs without turning package ma

Catch bad directives, missing binaries, and broken unit dependencies before `daemon-reload` with a practical `systemd-analyze verify` workflow.

Preconfigure hostname, locale, timezone, machine ID handling, and root access safely before first boot with systemd-firstboot.

Use `systemd-sysusers` to create service users and groups declaratively on Linux, validate changes safely with dry runs, and pair account creation with the righ

Use systemd-confext to ship portable, version-checked `/etc` overlays on Linux, with a safe testing workflow, practical examples, and clear rollback steps.

Replace broad root-style privilege with narrowly scoped Linux capabilities. Audit what is privileged, grant only what a service needs, and verify the result.

A practical, evidence-based guide to systemd-sysext on Linux, including directory-based extensions, compatibility metadata, refresh workflows, masking, and wher

A practical Linux guide to using needrestart after APT upgrades, including list-only checks, batch output, unattended-upgrades behavior, and a safe reboot decis

A practical Linux guide to mounting NFS shares on demand with systemd automounts, safer boot behavior, idle timeouts, and verifiable troubleshooting steps.

A practical Linux guide to enabling systemd-oomd, reading PSI pressure signals, and targeting the right services before the kernel OOM killer turns memory press

A technical deep-dive into self-hosting n8n with Docker Compose, focusing on performance, privacy, and long-term stability.