Linux

• Docker Compose Zero-Downtime Updates: Myth, Reality, and Patterns That Work
• WordPress Slow on Mobile: What to Optimize First
• VPN MTU tuning: why big files stall while web works (and how to pick the right MTU)
• ZFS Pool Recovery Basics: The Steps That Avoid Making It Worse
• ZFS dnodesize=auto: The Metadata Boost Everyone Forgets
• Ubuntu 24.04: IPv6 firewall forgotten — close the real hole (not just IPv4) (case #12)
• Ubuntu 24.04: Netplan changes don’t apply — why (and how to make them stick)
• ZFS vs btrfs: Snapshots, RAID, Recovery—Which One Bites Less?
• ZFS Compression Benchmarks: Measuring Real Gains, Not Placebo
• Ubuntu 24.04 “Network is unreachable”: routing table truth serum (and fixes)
• Proxmox Web UI Won’t Open on Port 8006: Restart pveproxy and Get Access Back
• ZFS Scrub Scheduling: How to Avoid Peak-Hour Pain
• Docker “No Space Left on Device”: The Hidden Places Docker Eats Your Disk
• Proxmox “dpkg was interrupted”: Fix Broken Packages Without Reinstalling
• ZFS volblocksize: The VM Storage Setting That Decides IOPS and Latency
• ZFS zpool split: Cloning a Mirror Pool for Migration or DR
• MariaDB vs Percona Server Upgrades: How to Avoid “Works on Staging” Lies
• Mail bounces: how to read bounce codes like a pro (and fix the root cause)
• Docker File Watching Is Broken in Containers: Fix Dev Hot Reload Reliably
• Debian 13 LACP Bonding Flaps: Proving Whether the Switch or Host Is Wrong
• Docker Private Registry TLS Errors: Fix Certificate Chains Properly
• WooCommerce Critical Error After Update: Roll Back and Recover Safely
• Docker Redis persistence without turning it into a slow disk app
• Proxmox LXC Bind-Mount Permission Denied: UID/GID, Unprivileged Containers, and the Fix That Actually Works
• MTA-STS: Should You Enable It, and How to Avoid Breaking Inbound Mail
• Debian 13: DNS over TLS/HTTPS — enable it without breaking enterprise networks (case #51)
• ZFS RAIDZ3: When Triple Parity Is Worth the Disks
• Docker on cgroups v2: pain, errors, and the fix path
• ZFS Queue Depth: Why Some SSDs Fly on ext4 and Choke on ZFS
• Debian 13: Journald ate your disk — cap logs without losing what matters
• Proxmox USB Passthrough Disconnects: Power, Autosuspend, and Stability Fixes
• MariaDB vs SQLite for Tiny VPS Projects: When MariaDB Is Overkill
• MariaDB vs PostgreSQL Container Storage: Bind Mount vs Volume Performance Truth
• Docker Service Discovery Fails: DNS and Network Aliases Done Right
• Pagination vs Infinite Scroll: UI Patterns That Don’t Annoy Users
• Docker Compose Project Name Collisions: Stop Stacks Overwriting Each Other
• Responsive Embeds That Don’t Break Layout: YouTube, Iframes, and Maps in Production
• Proxmox “pve-cluster.service failed”: How to Bring the Cluster Stack Back Up
• WireGuard AllowedIPs Confusion: Why Traffic Doesn’t Go Where You Expect (and How to Fix It)
• Debian 13: 100% iowait host freezes — find the noisy process/VM in 10 minutes
• VPN Slower Than Expected: Diagnose Router CPU, Crypto, and MSS Clamping Like You Mean It
• Ubuntu 24.04: Swap on SSD — do it safely (and when you shouldn’t) (case #50)
• Docker socket security: the one mount that equals root (and safer alternatives)
• Docker: Traefik route rules that silently fail — fix labels the right way
• Docker Volume Backups That Actually Restore
• Fail2ban for Mail: Rules That Actually Catch Attacks
• Ubuntu 24.04 “Connection reset by peer”: prove whether it’s client, proxy, or server (case #74)
• Proxmox local-lvm at 100%: find what ate your thin pool and fix it
• ZFS rollback: The Safe Way to Undo Mistakes Without Collateral Damage
• Debian 13: New interface name broke networking — stable naming fixes that survive reboots (case #7)