WordPress blocked by WAF: tune rules without opening security holes
Fix WordPress blocked by WAF without disabling protection. Triage false positives, tune rules safely, add exceptions, and verify with logs and tests.
Card grids that auto-fit columns with auto-fit/minmax (no media queries)
Build responsive card grids that auto-fit columns using CSS Grid auto-fit and minmaxβno media queries, fewer edge cases, better layout stability.
Email: S/MIME and TLS Confusion β What Actually Improves Security
TLS protects mail in transit; S/MIME protects message content end-to-end. Learn where each fails, what to deploy, and how to verify it.
Ubuntu 24.04 βPermission deniedβ executing scripts: noexec mounts and how to fix (case #58)
Diagnose Ubuntu 24.04 script βPermission deniedβ fast: spot noexec mounts, systemd sandboxing, and safe fixes for /tmp, /home, NFS, and containers.
Proxmox TASK ERROR: Where to Read Logs and Find the Root Cause Fast
A practical SRE guide to chasing Proxmox TASK ERROR failures: which logs to read, what commands to run, and how to pinpoint root cause fast.
Docker βnetwork not foundβ: rebuild networks without breaking everything
Fix Docker βnetwork not foundβ safely: diagnose fast, rebuild networks, recover Compose stacks, and avoid outages with practical commands and checks.
MySQL vs MariaDB in Docker: Why βIt Worked Locallyβ Fails in Production
A production-first guide to MySQL vs MariaDB in Docker: image differences, storage behavior, replication quirks, and a fast diagnosis playbook to stop outages.
Build a SaaS Pricing Table That Converts Without Breaking Your Frontend
Design a SaaS pricing table with a featured plan, sticky CTA, and responsive layoutβplus SRE-grade diagnostics to keep it fast and reliable.
Sticky elements without pain: sticky sidebars, headers, and why it breaks
Make CSS sticky work reliably: learn scroll containers, stacking, overflow traps, and a fast debug playbook with real incident stories and fixes.
Spectre/Meltdown: when CPUs became the security story of the year
Spectre and Meltdown turned CPU performance tricks into security liabilities. Learn what broke, how mitigations hurt, and how to diagnose safely.
Exploit markets: when bugs cost more than cars
A practical SRE guide to exploit markets: why zero-days cost more than cars, how attackers operationalize bugs, and how to harden systems fast.
VPN + RDP/SSH: Remote Access Without Opening Ports to the Internet
Build remote access with VPN, RDP, and SSH without exposing ports. Real ops playbooks, diagnostics, commands, and failure-proof practices.
VPN on Ubuntu/Debian: UFW/nftables Mistakes That Lock You Out (and Fixes)
Practical guide to avoid UFW/nftables VPN lockouts on Ubuntu/Debian: diagnose fast, fix routing and rules, and keep remote access alive.
ZFS vs btrfs: Where btrfs Feels Nice and Where It Hurts
A production-minded ZFS vs btrfs comparison: where btrfs shines, where it bites, and how to diagnose performance, corruption, and space issues fast.
Docker Build Cache Invalidation: Why Builds Are Slow and How to Speed Them Up
Learn why Docker builds get slow: cache invalidation, context bloat, and layer order. Diagnose fast, fix with BuildKit, and ship quicker.
Docker Compose: Depends_on Lied to You β Proper Readiness Without Hacks
Stop trusting depends_on for service readiness in Docker Compose. Learn real health checks, wait strategies, and fast diagnosis playbooks for startups.
CSS Grid vs Flexbox: Decision Rules and Layout Recipes That Survive Production
Practical rules to choose CSS Grid vs Flexbox, debug real layout failures, and reuse hardened recipes for nav, cards, forms, and dashboards.
WordPress Canβt Upload Images: Fast Troubleshooting for Permissions, Limits, and Libraries
Fix WordPress image upload failures fast: verify filesystem permissions, PHP limits, storage space, security rules, and missing libraries with proven commands.
10 GPU Myths That Refuse to Die
Ten stubborn GPU myths debunked with production-grade checks, commands, and failure modesβcovering memory, utilization, IO, drivers, and bottlenecks.
Ubuntu 24.04: Cron Runs Manually but Not on Schedule β PATH/Env Gotchas and Fixes
Debug why cron works manually but not on schedule in Ubuntu 24.04: PATH, env, permissions, systemd, mail logs, and reliable fixes.
Tooltips Without Libraries: Positioning, Arrow, and ARIA-Friendly Patterns
Build robust tooltips without libraries: reliable positioning, arrows that behave, accessible ARIA patterns, and hard-won debugging playbooks from production UI.
Docker Daemon Wonβt Start: Read This Log First (Then Fix It)
A production-first guide to diagnosing and fixing Docker daemon startup failures using the right logs, commands, and decisionsβfast and safely.
ZFS Benchmarking: The Rules That Prevent Fake Results
A production-minded guide to ZFS benchmarking: avoid cache lies, sync traps, and bad fio jobs. Get repeatable rules, commands, and fast diagnosis.
ZFS mountpoint: The Mount Trap That Makes Datasets βDisappearβ
A production-grade guide to ZFS mountpoint traps that make datasets seem to vanish: overlays, legacy mounts, canmount, and fast diagnosis.
Proxmox OOM-killer events: why it kills processes and how to set sane limits
Understand why Proxmox triggers Linux OOM-killer, how memory pressure forms, and set VM/container limits, swap, and ZFS ARC safely.
Why Games Want One CPU and Rendering Wants Another
Games chase low-latency single-thread performance; renderers crave throughput. Learn the architectural tradeoffs, diagnosis steps, and fixes that work.
Accessible Focus States That Donβt Look Like Trash
Build focus states users can actually see: use focus-visible, skip links, and outlines that match your design without breaking accessibility.
Proxmox console wonβt open (SPICE/noVNC): where it breaks and how to fix
Debug Proxmox SPICE/noVNC consoles that wonβt open. Learn failure points, logs, firewall checks, TLS quirks, and fast fixes for PVE clusters.
Docker Mount Propagation Gotcha: Why Your Bind Mount Looks Empty (and Fixes)
When a Docker bind mount looks empty, mount propagation is often the culprit. Learn fast diagnosis steps, fixes, and safe practices for production hosts.
Docker βmanifest unknownβ: tags vs digests explained (and fixed)
Fix Docker βmanifest unknownβ fast: learn why tags lie, digests donβt, how registries answer pulls, and the exact commands to diagnose and recover.
Debian 13: TRIM Isnβt Running β Enable the fstrim Timer and Verify It Works
Fix missing SSD TRIM on Debian 13 by enabling the fstrim timer, validating discard support end-to-end, and diagnosing why it fails in minutes.
Proxmox PCI Passthrough Fails: IOMMU Groups and the Classic Traps
Diagnose Proxmox PCI passthrough failures fast: decode IOMMU groups, fix BIOS and kernel settings, and avoid VFIO traps with real commands.
ZFS send/receive DR drill: Practicing Restore, Not Just Backup
Run a real ZFS send/receive disaster recovery drill: verify snapshots, throughput, encryption, and recovery time with commands, pitfalls, and checklists.
Docker Compose Profiles: Dev/Prod Stacks Without Duplicate YAML
Run dev and prod Docker Compose stacks from one file using profiles. Avoid YAML sprawl, control risk, and debug faster with real ops tactics.
ZFS snapshot deletion: Why Snapshots Refuse to Die (and How to Fix It)
Deep dive into why ZFS snapshots wonβt delete: holds, clones, busy mounts, replication, and space accountingβplus fast diagnosis and fixes.
Docker βexec format errorβ: Wrong-Arch Images and the Clean Fix
Stop Docker βexec format errorβ fast: identify wrong-arch images, fix builds with multi-arch manifests, and harden CI to prevent repeats.
Modern CSS :has() in Real UI: Parent Selectors for Forms, Cards, Filters
Use CSS :has() to style parents from child state in forms, cards, and filtersβshipping safer UI with fewer JS hacks and better debuggability.
Intel vs AMD in games: where benchmarks mislead you
Gaming benchmarks can lie by hiding CPU limits, memory tuning, boost behavior, and frametime spikes. Learn to diagnose Intel vs AMD correctly.
Ubuntu 24.04 TLS/Cert Errors After Time Drift: Fix NTP/Chrony the Right Way
Diagnose and fix TLS certificate failures caused by clock drift on Ubuntu 24.04. Set up Chrony correctly, verify time sources, and prevent repeats.
ZFS Disaster Scenarios: What Fails First and What You Can Save
A practical SRE guide to ZFS failure modes: what breaks first, how to triage fast, which data you can still recover, and what to do next.
ZFS Replication Over WAN: Making Sends Fast on Slow Links
A practical SRE guide to fast, safe ZFS replication over slow WAN links: tuning send/recv, compression, buffering, SSH, snapshots, and diagnosis.
PostgreSQL vs YugabyteDB: distributed Postgres-styleβamazing or overkill
A production-minded comparison of PostgreSQL and YugabyteDB: latency, consistency, ops burden, failure modes, and when distributed Postgres is worth it.
DNS Wildcard Records: The Convenience That Quietly Breaks Things (and Fixes)
Wildcard DNS records simplify subdomains but can sabotage ACME, mail, routing, and debugging. Learn failure modes, fast diagnosis, and safer patterns.
Split-horizon DNS: Make LAN names resolve without breaking the public internet
Run split-horizon DNS safely: internal-only names, correct public resolution, fast diagnostics, and failure-proof configs for real production networks.
The mining era: how crypto broke GPU pricing (again and again)
Crypto mining turned GPUs into scarce infrastructure. Learn the cycles, failure modes, and practical playbooks to buy, run, and recover sanely.
Why VRAM Will Matter Even More After 2026
After 2026, VRAM becomes the real limiter for AI and graphics: batching, context, and reliability all collide. Learn diagnosis and fixes.
PostgreSQL vs Percona Server tuning: who needs more knobs for speed
A production-minded comparison of PostgreSQL and Percona Server tuning: which knobs matter, how to diagnose bottlenecks fast, and avoid costly myths.
Breadcrumbs + Next/Prev Navigation for Documentation Sites (Clean, Fast, Accessible)
Ship breadcrumbs and next/prev docs navigation thatβs fast, accessible, and low-maintenanceβwithout hurting SEO, caching, or build times.
Proxmox βcould not resolve hostβ: DNS/IPv6/proxy quick root-cause workflow
A production-grade workflow to fix Proxmox βcould not resolve hostβ errors by isolating DNS, IPv6, routing, and proxy failures fast and safely.
Docker volumes: Permission denied β UID/GID strategies that stop the pain
Stop Docker volume permission denied errors with practical UID/GID strategies, fast diagnosis, and production-ready fixes for bind mounts and named volumes.