Linux

• ZFS Encryption + Compression: The Order That Makes Performance
• ZFS dedup: The Checkbox That Eats RAM and Ruins Weekends
• Route-based vs policy-based VPN: which is better for offices and why
• Modern Login and Register Forms That Don’t Betray You in Production
• DNS EDNS0 Fragmentation: The Hidden Cause of “Works on Wi‑Fi, Fails on LTE”
• WordPress wp-admin Won’t Open: The Real Reasons and Fixes
• ZFS offline/online: Using Maintenance Mode Without Breaking Redundancy
• ZFS on Proxmox vs VMFS on ESXi: Snapshots, Performance, Recovery, and Real-World Gotchas
• Site-to-site VPN routing: why the tunnel is up but nothing works (and how to fix it)
• Debian 13 “Read-only file system” surprise: fastest path to root cause and recovery
• ZFS vdev removal: What You Can Remove (and the Limits You Must Respect)
• ZFS acltype: POSIX vs NFSv4 ACLs Without Confusion
• Ubuntu 24.04: MySQL “server has gone away” — fix timeouts and packet limits properly (case #36)
• ZFS Checksum Errors: What They Mean and What To Do First
• Proxmox “QEMU exited with code 1”: read the error, find the real cause
• Proxmox Windows VM is slow: 8 settings (disk/cache/IO thread/drivers) that matter
• ZFS Scrub vs SMART Long Test: Which One Finds What
• ZFS fundamentals: What You Actually Get in Practice (and When ext4/XFS Wins)
• Office-to-office VPN + DHCP: how to avoid IP conflicts and chaos
• Ubuntu 24.04 Hard Lockups: Collect Evidence and Narrow It Down Fast
• WordPress Theme Broke Your Site: Switch to a Default Theme Without wp-admin
• Proxmox “VM disk vanished”: storage vs config, and how to diagnose it
• ZFS zpool upgrade: When to Upgrade and When to Wait
• OpenVPN “TLS Error: TLS key negotiation failed”: Common Causes and Fixes
• Proxmox “Connection refused” on 8006 after updates: what to check first
• Ubuntu 24.04: LVM thin pool 100% — save your VMs before it’s too late
• Copy to Clipboard Buttons That Don’t Lie: States, Tooltips, and Feedback
• ZFS vs Storage Spaces: Why “Easy” Can Become “Opaque”
• ZFS Upgrading OpenZFS: The Checklist That Prevents Breakage
• Ubuntu 24.04 Apache vs Nginx confusion: fix port binding and proxy loops cleanly (case #94)
• Debian 13: NFS timeouts — the mount options that improve stability (and when they don’t)
• ZFS Compression with zstd: Picking Levels Without Burning CPU
• Ubuntu 24.04: Fail2ban isn’t banning anything — the quick verification workflow
• Fix WordPress “There has been a critical error”: enable WP_DEBUG and recover the site
• MariaDB vs MongoDB: Write Bursts—Who Survives Spikes Without a Meltdown
• Office VPN Logging: Track Connections and Detect Unauthorized Clients
• Ubuntu 24.04 “Clock skew detected” — fix time sync and stop build/deploy failures (case #46)
• ZFS Raw Send: Replicating Encrypted Data Without Sharing Keys
• ZFS NFS Sync Semantics: Why Clients Change Your Write Safety
• Docker “Text file busy” During Deploy: The Fix That Stops Flaky Restarts
• Email: HELO/EHLO wrong — fix it before providers throttle you
• Debian 13 “Too many open files”: the correct systemd limit fix (not just ulimit)
• ZFS Kubernetes: PV Design That Won’t Bite During Node Failures
• ZFS fio for VMs: Profiles That Match Reality (Not Marketing)
• ZFS xattr: The Compatibility Choice That Changes Performance
• Docker + Reverse Proxy: 502 Mysteries — Where the Break Really Is (and Fixes)
• WireGuard Windows Won’t Connect: 10 Fixes That Solve Most Cases
• Debian 13 “Start request repeated too quickly”: systemd fixes that actually stick
• Docker Orphan Containers: Why They Appear and How to Purge Safely
• ZFS refquota: The Only Quota That Stops “Used Space Lies”