https · 22 sept 2026
How to Check Your SSL Certificate Is Working From Outside
A plain-English way to confirm your HTTPS certificate works for real visitors, not just on your own machine.
Blog de Server Manager
El Diario
Guías e historias sobre cómo gestionar tu propio servidor — sin vivir en la terminal.
Server Hacked? What to Do First
A plain-English first-response plan for containing a hacked server, preserving what matters, and getting back online safely.
How to Check Running Processes on a Linux Server
A plain-English guide to seeing what is running on your server, what is using CPU or memory, and what to do when something looks suspicious.
Is Self-Hosting Safe? An Honest Risk Breakdown
Self-hosting can be safe if you understand the main risks: exposed services, weak updates, broken HTTPS, missing backups, and forgotten setup details.
How to Close Open Ports on Linux You Don’t Need
A plain-English guide to finding open Linux ports, deciding what should stay reachable, and closing the rest safely.
How to Upload Files to a VPS: scp, sftp, and rsync
A plain-English guide to choosing scp, sftp, or rsync when moving files from your computer to your server.
How to Tell If Your Server Has Been Hacked
A plain-English guide to spotting hacked-server warning signs, checking safely, and getting back to a setup you can trust.
Why Your App Crashes Under Load: Linux Out of Memory Killed Process
A plain-English guide to why Linux kills apps when memory runs out, how to recognize OOM events, and how to prevent them.
"Site can't be reached" after deploying — how to diagnose
A plain-English path for finding where a newly deployed site stops: domain, server, firewall, web server, app, or HTTPS.
What is a Caddyfile and how do you write one?
A plain-English guide to what a Caddyfile is, what it controls, and how to write one without turning your web server into a mystery box.
How to fix "No space left on device" on Linux
A plain-English guide to finding what filled your Linux server, clearing safe space, and preventing the error from coming back.
How to Update Ubuntu Server Safely Without Breaking It
A plain-English guide to patching Ubuntu Server with backups, small steps, and checks that keep your sites and apps online.
How to Check Server Logs on Linux and Find What Actually Broke
A plain-English guide to reading Linux server logs so you can trace errors to the real cause instead of guessing.
Why your Docker container keeps restarting
A plain-English guide to Docker restart loops, the common causes, and how to get a container stable again.
How to fix "port already in use" (EADDRINUSE)
A plain-English guide to what EADDRINUSE means, why ports clash, and how to fix the problem without breaking another app on your server.
What Does Self-Hosting Actually Mean?
Self-hosting means running your own apps on a server you control, with more ownership and more responsibility than using a hosted service.
Create a non-root sudo user on a VPS and why root login is risky
A plain-English guide to creating a safer sudo user, avoiding root login mistakes, and keeping server access understandable over time.
Your domain isn't pointing to your server: DNS troubleshooting
A plain-English guide to checking why your domain is not pointing to your server, from nameservers and A records to www, IPv6, and HTTPS confusion.
How to fix an expired or untrusted SSL certificate
A plain-English guide to fixing SSL certificate expired and untrusted certificate errors without guessing.
How to fix "Permission denied (publickey)" over SSH
A plain-English checklist for fixing the SSH error "Permission denied (publickey)" without locking yourself out again.
DigitalOcean App Platform vs Droplet: Which Should You Choose?
A plain-English comparison of DigitalOcean App Platform and a DigitalOcean Droplet for small web apps, costs, control, maintenance, and long-term clarity.
Docker image vs container: what's the difference?
A plain-English guide to Docker images and containers, with the practical difference that matters when you deploy apps on a server.
Hetzner vs DigitalOcean vs Contabo: best VPS for beginners
A plain-English comparison of Hetzner, DigitalOcean, and Contabo for beginners choosing their first server provider.
Cloudron vs Coolify vs a Raw VPS for Self-Hosting
A plain-English comparison of Cloudron, Coolify, and a raw server so you can choose the right self-hosting path without creating a maintenance mess.
Docker vs no Docker: should you containerize your app?
A plain-English guide to when Docker helps your app deployment, when it adds needless weight, and how to choose the calmer path.
How to Host a Website on a VPS, Start to Finish
A plain-English path from empty server to live website, with domains, web servers, HTTPS, safety, and upkeep explained.
Managed Database vs Self-Hosted Postgres: Which Should You Choose?
A plain-English guide to choosing between a managed database and self-hosted Postgres, with the tradeoffs that matter for small teams and solo projects.
Self-hosted PaaS vs a plain VPS: do you even need Coolify?
A plain-English guide to when Coolify helps, when a plain server is enough, and how to avoid adding complexity too early.
What Are Ports, and Which Ones Matter for a Web Server?
Ports are numbered doors into your server, and a web server usually needs only a few of them open to serve websites safely.
Caddy vs Nginx vs Traefik: Which Reverse Proxy Should You Use?
A plain-English comparison of Caddy, nginx, and Traefik so you can choose the right reverse proxy without making your server hard to manage later.
Vibe-coded to production: the 8-step checklist AI builders skip
A plain-English deployment checklist for taking a vibe-coded app from a working demo to something real users can safely use.
Do You Need Docker to Deploy an App Built with AI?
Docker can help deploy an AI-built app, but it is not always the simplest or safest first step.
How to Keep Your App Running 24/7 After You Log Out
Learn why apps stop when an SSH session closes, and which safer options keep them running on your server.
How to self-host Uptime Kuma to monitor your sites
Self-host Uptime Kuma when you want simple uptime alerts for your websites, domains, certificates, and services without handing that job to a third party.
Put your AI-built app on your own domain with HTTPS
A plain-English guide to connecting an AI-built app to a custom domain and serving it safely over HTTPS.
How to self-host a Ghost blog
A plain-English guide to what you need, what can break, and how to keep a self-hosted Ghost blog understandable over time.
Why your AI app works in preview but not live
A plain-English guide to the common reasons an AI app succeeds in preview but fails after deployment, from missing secrets to domain, timeout, and storage differences.
Container vs virtual machine: what's the difference?
A plain-English guide to how containers and virtual machines differ, when each makes sense, and what that means for your server.
How to self-host n8n for automations
A plain-English guide to self-hosting n8n, what it needs, and the common problems to avoid before your automations depend on it.
Your AI App Needs a Backend — Where Does It Actually Run?
A plain-English guide to where an AI app backend lives, what it does, and how to choose a hosting setup that will not become a mystery later.
How to Install Node.js, Python, and PHP on a Fresh VPS
A plain-English guide to installing the right app runtime on a fresh server without creating version conflicts or mystery errors.
How to self-host Jellyfin for your media
A plain-English guide to self-hosting Jellyfin, including server size, storage, streaming issues, remote access, and how to keep the setup understandable over time.
Is it safe to let an AI run commands on your server?
AI can safely help with server commands only when its access is limited, visible, and backed by a way to recover from mistakes.
How to self-host Paperless-ngx for your documents
A plain-English guide to self-hosting Paperless-ngx, what it needs, and how to keep your document archive safe and understandable.
How to Move Your Website to a New VPS With Zero Downtime
A plain-English migration plan for moving a live website to a new server without visitors seeing a broken page.
How to self-host Immich (Google Photos alternative)
A plain-English guide to self-hosting Immich, including storage, backups, HTTPS, and the mistakes that make photo libraries painful later.
Cloud firewall vs server firewall: why your port is still blocked
A plain-English guide to why an open port can still be unreachable when both your cloud firewall and server firewall are involved.
How to migrate a WordPress site to a new server
A plain-English guide to moving WordPress to a new server without losing files, breaking links, or surprising visitors.
How to Turn On Automatic Security Updates on Ubuntu
Automatic security updates on Ubuntu help patch known risks without turning server maintenance into a daily chore.
How to Move from Render to Your Own VPS
A plain-English guide to moving an app from Render to your own server without losing track of domains, HTTPS, databases, or deployments.
SSH keys vs passwords on a VPS: log in the right way
A plain-English guide to why SSH keys are safer than passwords, what can go wrong, and how to keep server access understandable over time.
How to harden SSH on your server
A plain-English guide to making SSH safer without locking yourself out of your own server.
How to migrate from Railway to a VPS and cut the bill
A plain-English guide to moving a Railway app to your own server without breaking domains, databases, HTTPS, or your deployment notes.
How to Set Up Fail2ban to Stop Brute-Force Attacks
A plain-English guide to using fail2ban to block repeated login attempts before they become a real problem.
What Is a Firewall and How Does It Protect Your Server?
A plain-English guide to what a server firewall does, what it cannot do, and why it should be one of your first security steps.
New VPS Setup Checklist: What to Do in the First Hour
A plain-English first-hour checklist for making a new server safer, clearer, and easier to recover before you deploy anything important.
How to Move a Vercel App to a VPS
A plain-English migration guide for moving a Vercel app to your own server without losing domains, HTTPS, environment variables, or deploy sanity.
How to Migrate from Heroku to Your Own VPS
A plain-English guide to moving a Heroku app to your own server without losing data, breaking domains, or making the setup impossible to understand later.
VPS Security Checklist: 10 Things to Do Before You Go Live
A plain-English launch checklist for securing a server before real users, traffic, and data arrive.
Why your app works locally but not on the server
A plain-English guide to why an app works locally not in production, and how to find the missing assumption.
How does DNS work — and what does "pointing a domain" mean?
A plain-English guide to DNS, domain pointing, common DNS records, and why changes sometimes take time to appear.
How to fix "Connection refused" on your server
A plain-English guide to what the "Connection refused" error means, where it usually comes from, and how to narrow it down without guessing.
How to fix "502 Bad Gateway" from nginx
A plain-English guide to what nginx 502 Bad Gateway means, why it happens, and how to narrow the fix without guessing.
Render vs Railway vs a VPS: Which Should You Use?
A plain-English comparison of Render, Railway, and running your own server, with the trade-offs that matter after launch.
What is Docker, explained simply?
A plain-English explanation of Docker, containers, images, and when they help on a server.
Heroku vs a VPS in 2026: Is It Time to Switch?
A plain-English way to decide whether Heroku's convenience is still worth it, or whether your own server now fits better.
What Is a VPS — and Do You Actually Need One?
A plain-English guide to what a virtual private server is, when it makes sense, and when simpler hosting is enough.
Railway vs a VPS: Real Cost and Control
Compare Railway with your own server in plain English: what you pay for, what you control, and where the hidden work lives.
Vercel vs VPS for Next.js: which should you choose?
A plain-English guide to choosing between Vercel and your own server for a Next.js app, based on control, cost, maintenance, and failure modes.
Coolify vs Dokploy vs CapRover: which self-hosted PaaS should you pick?
A plain-English comparison of Coolify, Dokploy, and CapRover so you can choose the right self-hosted PaaS for your server.
What is an SSL certificate and why does your site need one?
A plain-English guide to SSL certificates, HTTPS, browser warnings, and the problems a good certificate setup prevents.
How to add a real database to your AI-built app
A plain-English guide to moving your AI-built app from temporary storage to PostgreSQL or MySQL without losing data, secrets, or your future sanity.
What Is SSH and How Does It Work?
A plain-English guide to SSH: what it is, how it protects remote server access, and what beginners should watch for.
You Built an App with AI. Here's the One Part It Can't Do: Run It
AI can help you build an app quickly, but hosting still means making it reachable, safe, and understandable after the code is generated.
How Do You Move a Replit App to Your Own VPS?
A plain-English migration guide for moving a Replit app to your own server without losing track of domains, environment variables, HTTPS, or restarts.
How to Connect to Your VPS Over SSH for the First Time
A plain-English first SSH login guide: what you need, what to type, and what the common connection errors mean.
From localhost to live: deploying a Cursor-built app
A plain-English guide to taking a Cursor-built app from localhost to a real production server without losing track of domains, HTTPS, databases, and runtime settings.
Deploying a v0 app outside Vercel: a plain-English guide
You can deploy a v0 app without Vercel, but you need to understand what v0 generated, what runs the app, and which hosting chores Vercel was quietly handling for you.
What Is a Reverse Proxy? In Plain English
A reverse proxy is the front door that receives web traffic and sends it to the right app behind the scenes.
How to deploy a Lovable app to your own server beyond static hosting
A plain-English guide to moving a Lovable app from static hosting to your own server when you need APIs, databases, HTTPS, and long-term control.
How to host a Bolt.new app on your own VPS
A plain-English guide to taking a Bolt.new app from generated code to a stable website on your own server.
How to Run Cron Jobs on a VPS Without Becoming a Sysadmin
Learn how scheduled tasks work on a server for backups, scripts, reminders, and recurring app jobs without turning your weekend into operations work.
SSH Keys on a VPS: A Safer Way to Log In Than Passwords
SSH key login replaces easy-to-guess server passwords with a paired lock-and-key system that is safer and easier to live with once you understand it.
Self-Host Jellyfin on a VPS or Home Server: Your Private Netflix-Style Media Server
Learn what it really takes to self-host Jellyfin, from storage and streaming limits to privacy, security, and keeping the setup understandable over time.
How to Send Email From a VPS Without Running Your Own Mail Server
Send website or app emails from your server safely by handing delivery to an external email provider instead of hosting mail yourself.
How to Keep a VPS Updated Without Breaking Everything
Learn which server updates are safe to automate, which ones deserve a slower look, and how to reduce security risk without turning maintenance into a gamble.
How to Read Server Logs When Something Breaks
Learn what server logs are, where errors usually appear, and how to use them to narrow down website or app problems without guessing.
Coolify, Dokploy, or a raw VPS: where the self-hosted PaaS tools stop
Coolify and Dokploy make deploying your app on your own server feel like Heroku. But they run on top of a server that someone still has to secure, update, and keep alive. Here's an honest map of where they end and the sysadmin part begins.
Docker en un VPS para principiantes: qué es, cuándo lo necesitas y cuándo no
Una guía en palabras sencillas sobre Docker en tu servidor: qué hace, cuándo ayuda y cuándo solo añade otra capa que gestionar.
¿Por qué mi VPS va lento? Guía para principiantes sobre problemas de CPU, RAM, disco y tráfico
Descubre los motivos más habituales por los que un servidor parece lento, cómo distinguirlos y qué suele significar cada uno.
Cómo alojar varios sitios web en un VPS sin liarte
Ejecuta varios sitios o apps en un solo servidor dando a cada proyecto su propio dominio, su ruta, su certificado HTTPS y unos límites bien ordenados.
¿Qué tamaño de VPS necesitas? Una guía sencilla sobre CPU, RAM y almacenamiento
Elige el tamaño de servidor adecuado para una web, una app o un servicio autoalojado sin pagar por una potencia que no necesitas.
Cómo hacer una copia de seguridad de tu servidor — y poder restaurarla de verdad
La mayoría de la gente o no tiene copias de seguridad o nunca ha probado las que tiene. Una copia que no puedes restaurar no es una copia de seguridad. Aquí tienes qué guardar, dónde conservarlo y cómo saber que funciona de verdad.
Cómo publicar una pequeña web app en un VPS sin DevOps
Tu app funciona de maravilla en el portátil — lo difícil es la distancia entre «funciona en mi máquina» y «en vivo en internet». Esto es lo que implica de verdad publicarla, las cuatro cosas que toda app necesita y cómo saltarte toda la configuración.
Cómo pasar del hosting compartido de cPanel a tu propio VPS
El hosting compartido te dio el empujón inicial, pero el precio de la renovación, los límites de recursos y los vecinos ruidosos acaban pesando. Pasar a tu propio servidor suena a salto al vacío, cuando en realidad es una lista corta de tareas. Esto es lo que se mueve, en qué orden y sin cortes de servicio.
Nextcloud autoalojado: una nube privada que es de verdad tuya
Tus archivos viven en la nube de otra persona — pagados cada mes, con un límite y analizados en silencio. Nextcloud es un Dropbox o un Drive que gestionas tú mismo. Esto es qué es, por qué merece la pena tenerlo y qué hace falta para configurarlo.
Cómo configurar un firewall en tu VPS (y por qué lo necesitas)
Un servidor recién creado es accesible desde toda la red en cuestión de minutos — bots incluidos. Un firewall decide qué puertas siguen abiertas. Esto es lo que hace, la única regla que te mantiene a salvo y el error que te deja fuera.
Cómo conseguir HTTPS gratis en tu propio servidor
El candado en la barra de direcciones ya no es un lujo — es gratis, automático y algo que se da por sentado. Esto es lo que hace realmente el HTTPS, por qué dejó de costar dinero y cómo se configura sin que tengas que gestionar nunca un certificado.
He comprado un VPS, ¿y ahora qué? Los primeros pasos para principiantes
Has alquilado un servidor y has recibido una dirección IP, una contraseña y un cursor que parpadea. Esto es lo que de verdad es un servidor, las cuatro cosas que todo servidor nuevo necesita y cómo empezar sin convertirte en administrador de sistemas.
Hosting gestionado o tu propio VPS: ¿qué te conviene elegir?
El hosting gestionado es cómodo, pero lo pagas y renuncias al control. Un VPS cuesta menos y es completamente tuyo, pero el administrador de sistemas eres tú. Aquí tienes una comparación honesta — y una tercera opción que concilia ambas.
Cómo apuntar un dominio a tu servidor (sin editar archivos de configuración)
Tienes un servidor con una dirección IP y un dominio que compraste en otro sitio. Conectarlos es un pequeño cambio de DNS: aquí te explicamos qué significa, el único registro que necesitas y cómo llega después el candado.
Vaultwarden autoalojado: un gestor de contraseñas que es de verdad tuyo
Tus contraseñas viven ahora mismo en el servidor de otra persona. Vaultwarden es un gestor de contraseñas ligero y compatible con Bitwarden que ejecutas tú mismo — aquí tienes qué es, por qué merece la pena tenerlo y qué hace falta para ponerlo en marcha.
¿Por qué no carga mi sitio web? Las tres capas que deciden si es accesible
Has publicado tu sitio, a ti te funciona, pero quien lo visita ve una pestaña que gira o un «no se puede acceder». El problema está siempre en una de las tres capas entre el navegador y tu servidor — aquí tienes cómo saber cuál.
Cómo instalar WordPress en un VPS sin tocar el terminal
Alquilaste un servidor para gestionar tu propio WordPress y te topaste con un muro de SSH, servidores web y DNS. Esta es la vía rápida: describe lo que quieres en español y deja que la app haga el trabajo de sysadmin.