Voxfor Magazine.

Database

A Stale PostgreSQL Replication Slot Can Fill Your Disk

Do not delete files from pg_wal to solve a growing PostgreSQL disk. A persistent physical or logical replication slot tells PostgreSQL that…

Aug 3, 20269 min read

Linux

Fix Linux VPS Clock Drift Without Breaking Running Services

Clock drift rarely introduces itself as “clock drift.” It arrives as a certificate that is “not yet valid,” an expired login token…

Aug 2, 202612 min read

DevOps

Cloud-Init Says Done, but Your VPS Is Not Ready

A new VPS can carry three different clocks. The provider may label it running when the virtual machine starts, cloud-init may report…

Aug 2, 202611 min read

Dedicated Server

Proxmox Backup Server Restore Drills Before Host Failure

Proxmox Backup Server verification and a VM restore drill answer different recovery questions. Verification reads backup data and checks its integrity. A…

Aug 2, 202615 min read

Linux

Why systemd Stops Restarting a Failed Service

start-limit-hit is not the reason your application failed. It means systemd observed too many start attempts inside the unit's configured interval and…

Aug 2, 202610 min read

DevOps

Anycast or GeoDNS? Match Failover to the Failure Mode

Anycast and GeoDNS are often presented as rival ways to send users toward a nearby server. That comparison hides the decision that…

Aug 2, 202612 min read

Linux

Fix WireGuard MTU Black Holes on a VPS

A WireGuard tunnel can show a recent handshake, pass a small ping, and still fail when it carries a web page, file…

Aug 2, 202614 min read

DevOps

Harbor on a VPS: Operate a Recoverable Private Registry

A private registry becomes part of the deployment path the moment CI pushes an image that production must later pull. Installing Harbor…

Aug 2, 202615 min read

Windows

Windows Server Patching with a Tested RDP Return Path

A Windows Server update can install successfully and still turn a routine maintenance window into an access incident. The server may reboot,…

Aug 2, 202614 min read

Database

Redis to Valkey: A Single-Writer Migration Plan

The dangerous moment in a Redis-to-Valkey migration is not installing the new binary. It is the interval when two servers could accept…

Aug 2, 202610 min read

AI & Machine Learning

Keep LiteLLM Provider Keys Out of Every Client App

LiteLLM Proxy can give several applications one OpenAI-compatible endpoint without distributing the underlying provider credentials. The safe pattern is to keep the…

Aug 2, 20269 min read

Security

Back Up Vaultwarden Without Losing Attachments

A recoverable Vaultwarden backup needs more than db.sqlite3. Capture a consistent database, file attachments, any Sends you intend to preserve, the RSA…

Aug 2, 202610 min read

WooCommerce Hosting

Why WooCommerce Scheduled Actions Fall Behind

A WooCommerce scheduled-actions backlog is a symptom, not a cleanup target. Start by finding which hook is late or failing, read its…

Aug 2, 20269 min read

Linux

When CPU Steal Time Slows Your VPS

CPU steal time is the share of time a virtual CPU was ready to work but could not run because the hypervisor…

Aug 2, 202611 min read

Linux

Stop Docker Logs from Filling Your VPS Disk

Docker can fill a VPS disk even when images and volumes are modest. The usual cause is the default json-file logging driver…

Aug 2, 20269 min read

DevOps

Caddy Reverse Proxy Reloads Without VPS Downtime

Quick answer: put Caddy on public ports 80 and 443, keep the application on a loopback address such as 127.0.0.1:3000, and leave…

Aug 2, 202611 min read

Security

MinIO Object Lock Backups on a VPS: Avoid False Safety

MinIO Object Lock can stop protected backup versions from being permanently deleted through the S3 API before their retention expires. The safe…

Aug 2, 202612 min read

Linux

Postfix Mail Queue Triage: Diagnose Delays Before Retrying

A growing Postfix queue is evidence, not a command to flush everything. The safe response is to capture the queue shape, follow…

Aug 2, 202610 min read

Database

PgBouncer on a VPS: Stop PostgreSQL Connection Exhaustion

PgBouncer can protect PostgreSQL from connection bursts by accepting many application clients while keeping a smaller, controlled set of database sessions open.…

Aug 2, 20269 min read

Linux

Uptime Kuma Monitoring Without an Exposed Dashboard

At 02:17, a customer-facing API stops answering. A monitor on the same server disappears with it, so nobody receives the alert. That…

Aug 2, 202610 min read

Security

Secure VPS Access with Tailscale SSH

Public SSH is convenient, but a login port exposed to the internet receives constant scanning even when passwords are disabled. A Tailscale…

Aug 2, 20269 min read