Archivo: abril 2026

Introduction

Changing the hostname of your Linux server helps with identification and organization, especially in multi-server environments. This guide shows you how to change the hostname safely.

Step-by-step Guide

1. Check the current hostname
   • hostname

Introduction

Adding new users in Linux is essential for managing access and security on your server. This guide shows you how to create a new user, set a password, and assign permissions.

Step-by-step Guide

1. Add a new user
   • sudo adduser newusernamen
     • (Replace newusername with the desired username)

Introduction

High CPU usage can slow down your server and affect website performance. This guide shows you how to identify and fix the most common causes of high CPU usage in Linux.

Step-by-step Guide

1. Check current CPU usage
   • topn
     • o usa:
     • htop

Recomme

Introduction

Let’s Encrypt provides free SSL certificates, making it easy to secure your website with HTTPS. This guide shows you how to install a Let’s Encrypt SSL certificate on your server using Certbot.

Step-by-step Guide

1. Update your package list and install Certbot
   • For Nginx:n
     • sudo apt update
     • sudo apt install certbot python3-certbot-nginx

Introduction

ginx is a high-performance web server that’s lightweight, fast, and ideal for serving static and dynamic websites. This guide shows you how to install and start using Nginx on Ubuntu.

Step-by-step Guide

1. Update your package list
   • sudo apt update
   • Install Nginx
     • sudo apt install nginx

Introduction

Upgrading your PHP version in Ubuntu is essential for security, performance, and compatibility with modern applications like WordPress. This guide shows you how to safely upgrade PHP on your server.

Step-by-step Guide

1. Check your current PHP version
   • php -v
   • Add the PHP repository (if needed)
     • sudo apt update

Introduction

Step-by-step Guide

1. rn
2. Update your system and install Fail2Banrn
   • rn