Guides
GuidesKoboldCpp on a VPS: how to run a local LLM on CPU or GPU
Contabo has published a step-by-step guide to installing KoboldCpp on a Linux VPS and serving GGUF models via web interface and API.
GuidesERR_TOO_MANY_REDIRECTS: how to break a redirect loop
The site loops between HTTP and HTTPS, or between www and non-www. The command to see the chain, plus the four most common causes, one by one.
GuidesShorter-lived SSL certificates: how many renewals you'll need by 2029
The CA/Browser Forum and Let's Encrypt timelines: the dates from 2026 to 2029 and how many renewals you'll need with 10 or 50 certificates.
Guides502 Bad Gateway: what it means and how to fix it, step by step
Nginx got no response from PHP-FPM. The five most common causes, how to spot them in the logs, and how to get the site back up.
GuidesSGLang on GPU VPS: self-hosting LLMs with Docker
Contabo publishes a guide to installing SGLang via Docker on a GPU VPS: continuous batching, RadixAttention and an OpenAI-compatible API.
GuidesPHP 8.2 reaches End of Life on 31 December 2026: how many days are left and what to do
As of today, 5 October 2026, there are 87 days left until PHP 8.2's EOL. Official dates, supported alternatives, and what happened with PHP 8.1 to those who didn't migrate in time.
GuidesFree Softaculous exists. But not for everyone, and not forever.
The free licence is real: 59 scripts, one per server. The limits are three others — and if you are choosing a panel right now, the arithmetic changes.
GuidesFree CloudLinux does not exist. Here is what you can have without paying.
Seven dollars a month for one account, eighteen for unlimited, and no free edition. But half of what CloudLinux does can be built with systemd — and one panel now has it built in.
GuidesPatching mixed Linux fleets without downtime: CloudLinux guide
CloudLinux explains how to manage patches on servers running different distributions using KernelCare and ELS, eliminating scheduled reboots.
GuidesOVHcloud releases guide for deploying Microcks on MKS with Gateway API
OVHcloud explains how to install Microcks on an MKS cluster and expose it using Gateway API, Envoy Gateway and Public Cloud Load Balancer.
GuidesMigrating from AWS to European cloud: Contabo's guide to hidden costs and migration challenges
Contabo publishes a guide on egress fees, reserved instances and migration challenges when moving from AWS to Scaleway, OVHcloud, Hetzner and other providers.
GuidesGrafana Alloy as a central gateway: real-world sizing figures
Grafana shares how it sized Alloy for 17 million active series and 150 MB/s of traces, with pod configuration and HPA settings published.
GuidesCore Web Vitals: four Plesk extensions for server-side fixes
Plesk outlines a path using four extensions to boost LCP, INP and CLS scores without touching the site's code.
GuidesManaged vs unmanaged VPS in production: the sysadmin decision framework
Contabo publishes a guide with the practical criterion for choosing between managed and unmanaged VPS, including pricing for its unmanaged Cloud VPS range.
GuidesHow much VPS power for an AI agent: the crucial distinction between API or local model
Contabo publishes a VPS sizing guide for AI agents: choosing between calling an external API or running the model locally changes everything.
GuidesAWS alternatives for startups: Contabo compares managed VPS and PaaS
Contabo publishes a guide comparing Hetzner, DigitalOcean, Vultr and PaaS platforms like Render and Fly.io as alternatives to AWS for startups.
GuidesNode.js + PostgreSQL on a single VPS: how much RAM and CPU do you actually need?
Sizing guide: 2 vCPU and 4 GB RAM as the baseline for Node.js+PostgreSQL on a VPS, with a breakdown of where memory goes.
GuidesOVHcloud publishes reference architecture for self-hosted Langfuse on MKS with AI Endpoints
OVHcloud details how to deploy Langfuse on Managed Kubernetes Service to track token usage and AI Endpoints costs without exposing prompts beyond your infrastructure.
GuidesHow to verify if a CPU is truly dedicated: steal time, sysbench and stress-ng
Contabo publishes the method to uncover shared vCPUs masquerading as dedicated: steal time, repeated sysbench runs, and stress-ng for one hour.
GuidesVPS latency: geography matters more than any optimisation
Contabo explains why physical distance remains the primary factor in VPS latency and how to test it before selecting a region.