Linux

• Fix Proxmox pvestatd.service Failed: Restore Graphs and Statistics Fast
• Troubleshooting Proxmox Performance: CPU Steal, IO Wait, ZFS ARC, and Noisy Neighbors
• Debian 13: SSH port changed — fix firewall + sshd order without locking yourself out (case #87)
• ZFS Proxmox: VM Storage Defaults You Should Change Immediately
• Debian 13: TCP retransmits are killing performance — find where the loss really is
• ZFS RAIDZ2: The Sweet Spot for Capacity and Survival (Usually)
• Debian 13: Permissions Chaos After rsync — The Clean Way to Preserve Ownership
• ZFS health dashboard: The Metrics You Must Track (or You’re Blind)
• Docker Time Zone Drift in Containers: Fix It Without Rebuilding Images
• Email “550 5.7.1” policy blocks — the realistic fix path
• Proxmox “backup storage not available on node”: why “shared” isn’t shared
• Docker Nginx upstream errors: debug 502/504 with the correct logs
• WireGuard is Slow: MTU, Routing, CPU — Speed It Up Without Guesswork
• Best Proxmox Homelab Build in 2026: Hardware, NICs, Storage Layout, and Power Efficiency
• Docker “Permission Denied” on Sockets and Devices: Capabilities vs Privileged, Done Right
• DMARC Alignment: What It Is and How to Set It Correctly
• WordPress Soft 404: Why Google Thinks So and How to Fix It
• ZFS Sparse Volumes: The Overcommit Trap and How to Monitor It
• WordPress caching that doesn’t break carts and forms
• Debian 13: APT is broken (“unmet dependencies”) — fix it without reinstalling anything
• WordPress 502 Bad Gateway: PHP-FPM, Nginx, Cloudflare — How to Find the Culprit
• Ubuntu 24.04: CIFS is painfully slow — the mount options that usually fix throughput (case #22)
• MySQL vs ClickHouse for Realtime Dashboards: Build Fast Without Taking Down Checkout
• ZFS zpool status -v: Finding the Exact File That’s Corrupt
• Networking on Proxmox vs ESXi: VLAN trunking, bridges/vSwitches, bonding/LACP explained
• Fix Proxmox pve-firewall.service Failed Without Locking Yourself Out
• ZFS SLOG Sizing: How Much You Really Need (Not “Bigger Is Better”)
• Docker: I/O wait from hell — throttle the one container killing your host
• Docker: Limit Log Spam at the Source — App Logging Patterns That Save Disks
• ZFS iostat Basics: Turning Numbers Into a Bottleneck
• ZFS zdb Introduction: The Tool You Fear Until You Need It
• Import an ESXi VM into Proxmox: Windows/Linux, VirtIO Drivers, NIC Mapping, Boot Fixes
• Docker on SELinux/AppArmor Hosts: The Permission Errors Nobody Explains
• SPF Record Formatting: Quoting and Spaces That Quietly Break Email
• ZFS key management: The Part Everyone Forgets Until Disaster Day
• Ubuntu 24.04: SSH worked yesterday, now “Permission denied” — fix the 5 most common causes
• Ubuntu 24.04 updates broke kernel modules: rebuild initramfs correctly (case #28)
• Debian/Ubuntu Disk Latency Spikes: Prove It’s Storage, Not the App (Tools + Fixes)
• Ubuntu 24.04: PHP-FPM keeps crashing — the log line you must find (and the fixes)
• DNS over HTTPS and DNS over TLS: privacy without breaking corporate networks
• WordPress Thumbnail Issues: Regenerate Thumbnails Without Taking the Site Down
• A Non-Embarrassing 404 Page: Helpful Links, Search, Lightweight Humor
• ZFS ARC sizing: When Too Much Cache Slows Down Everything Else
• WordPress hacked: a step-by-step incident response that doesn’t make it worse
• Debian 13: Nginx suddenly returns 403/404 — permissions vs config, how to tell instantly
• Docker + UFW: Why your ports are open anyway — lock it down correctly
• IKEv2/IPsec: When It’s a Better Choice Than WireGuard or OpenVPN
• Ubuntu 24.04: VPN breaks DNS — fix resolvers and routes in the correct order (case #52)
• Ubuntu 24.04 “Illegal instruction”: CPU flags vs binaries — fix deployments cleanly (case #56)
• WordPress Gutenberg Editor Won’t Load: A Practical Debug Checklist