- Debian 13: SSH is slow to log in — DNS and GSSAPI fixes that speed it up instantly (case #65)
- Two offices on 192.168.0.0/24: connect them without renumbering
- MySQL vs SQLite: Migration Signs—Exactly When It’s Time to Upgrade
- Ubuntu 24.04: Certificates renew but Nginx still serves the old one — why and how to fix
- MySQL vs MariaDB: Kubernetes readiness—probes, restarts, and data safety
- Office VPN File Sharing: Stable SMB Between Offices Without Constant Disconnects
- PostgreSQL vs RDS PostgreSQL: performance tuning you still must do (even managed)
- Nginx for WordPress: Config Mistakes That Cause 5xx Errors (and Fixes)
- Debian 13 SATA Link Resets: Prove It’s the Cable or Backplane, Not Linux
- ZFS RAID Controller Passthrough: IT Mode vs HBA vs “Fake HBA”
- ZFS Latency Monitoring: The Graphs That Catch Disaster Early
- PostgreSQL vs Redis: how to stop cache stampedes from melting your DB
- Responsive Tables for Technical Docs That Don’t Break in Production
- Debian 13: /etc/pve looks empty after reboot — why mounts fail and how to recover
- Debian 13: Package pinning saved my server — how to use apt preferences without chaos
- Docker macvlan: Can’t Reach the Container — Fix the Classic Routing Trap
- Proxmox Ceph Slow Ops: Locate the Bottleneck (Disk, Network, or CPU)
- MySQL vs PostgreSQL: “CPU 100%”—how to prove it’s queries, not hardware
- A driver update killed my FPS: how to diagnose it properly
- Postfix SASL auth fails: the config gotchas and the fix order
- Print Styles for Docs That Don’t Embarrass You
- WordPress Domain Migration Without Losing SEO: 301s, Canonicals, Sitemaps, and Zero Drama
- MariaDB vs SQLite Backups: Simple Restore vs Real PITR
- Proxmox “Can’t Remove Node”: Safe Node Removal From a Cluster
- GitHub-Style Code Blocks: Title Bars, Copy Buttons, Line Numbers, and Highlighted Lines
- Rspamd False Positives: Tune Spam Scoring Without Letting Junk Through
- Proxmox VMs Have No Internet: vmbr0 Bridge Mistakes and Quick Fixes
- MySQL vs MariaDB: innodb_buffer_pool_size—the copy-paste tuning mistake that kills performance
- rDNS/PTR Missing: The Boring DNS Fix That Saves Email Deliverability
- PostgreSQL vs SQLite Concurrent Writers: Who Wins and Why
- ZFS primarycache: Caching Rules That Stop ARC From Wasting RAM
- Fixing Proxmox PBS “Authentication Failed”: Tokens, Permissions, and Fingerprints
- WordPress Media Library Looks Empty: Database Paths and URL Issues to Check
- MySQL vs Percona Server Monitoring: Find Killer Queries Without Guessing
- OpenVPN “route addition failed” on Windows: routing fixes that actually work
- MariaDB vs TiDB: migration promises vs production reality
- Ubuntu 24.04: UFW + Docker — lock down containers without breaking Compose (case #40)
- Email: SPF includes are a mess — how to simplify without breaking mail
- MySQL vs MariaDB on NVMe vs SATA SSD: why your DB still feels slow (and how to prove it)
- Debian 13 Split DNS for VPN and LAN: a clean setup that won’t break after reboot
- Ubuntu 24.04: IPv6 Breaks Random Sites — Fix Dual-Stack Properly (Don’t Just Disable IPv6)
- ZFS fio for Databases: Testing Sync Writes Without Lying to Yourself
- WireGuard split tunneling: route only what you need (and keep the rest local)
- ZFS zpool import -d: Finding Pools When Device Paths Change
- Proxmox GPU Passthrough Black Screen: UEFI/OVMF, ROM Issues, Reset Bugs, and Proven Fixes
- ZFS “Pool Full” Recovery: What Breaks First and How to Come Back
- PPTP Is a Trap: Why You Should Avoid It and What to Use Instead
- ZFS zpool initialize: Making New Drives Behave Better From Day One
- Docker IPv6 Leaks: Prevent “Oops, It’s Public” Exposure
- Ubuntu 24.04: Services in restart loop — stop the loop and catch the root error