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Janak bista
Janak bista

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Building a Linux Server From Scratch

#linux #devops #beginners #tutorial

Setting up a Linux server from scratch is one of the most valuable skills in system administration, DevOps, and cybersecurity. It helps you understand how servers actually work under the hood instead of relying on managed services.

In this guide, I’ll walk through how to build a basic Linux server, configure it, and make it ready for real-world use.

Why Build Your Own Linux Server?

A self-built Linux server helps you:

  • Understand system internals (users, permissions, services)
  • Host applications (web apps, APIs, databases)
  • Practice DevOps skills
  • Prepare for cybersecurity labs
  • Gain full control over your environment

Step 1: Choose Your Linux Distribution

For servers, the most common choices are:

Ubuntu Server (beginner-friendly)
Debian (stable and lightweight)
CentOS / Rocky Linux (enterprise-style systems)

In this guide, we will install Ubuntu Server.

Step 2: Install Linux Server

Get Ubuntu Server from:

Download ISO:Install:

Use VirtualBox, VMware, or physical machine
Select:
Minimal installation
OpenSSH server (IMPORTANT)

Step 3: Configure Network

Check IP address:

ip a
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Test internet:

ping google.com
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Update system:

sudo apt update && sudo apt upgrade -y
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Step 4: Secure Your Server
Create a new user:

sudo adduser user1
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Give sudo access:

sudo usermod -aG sudo user1
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Enable SSH access

Install SSH (if not installed):

sudo apt install openssh-server -y
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Check SSH status:

sudo systemctl status ssh
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Change SSH port (basic security step)

sudo nano /etc/ssh/sshd_config
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Change:

Port 22 → Port 2222

Restart SSH:

sudo systemctl restart ssh
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Step 5: Configure Firewall (UFW)

Enable firewall:

sudo ufw enable
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Allow SSH:

sudo ufw allow 2222/tcp
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Check status:

sudo ufw status
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Step 6: Install a Web Server (Optional but Common)
Install Nginx:

sudo apt install nginx -y
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Start service:

sudo systemctl start nginx
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Enable on boot:

sudo systemctl enable nginx
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Test:

http://your-server-ip

Step 7: Install Database (Optional)
MySQL:

sudo apt install mysql-server -y
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Secure installation:

sudo mysql_secure_installation
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Step 8: Install Developer Tools

sudo apt install git curl wget unzip -y
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Step 9: Monitor Server

Check system usage:

top
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Disk usage:

df -h
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Memory usage:

free -h
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Step 10: Final Test

Try accessing your server:

SSH login:
ssh user1@your-server-ip -p 2222
Open browser:
http://your-server-ip

🚀 What You have:

A secure Linux server
SSH access configured
Firewall protection
Optional web server and database
Basic monitoring tools

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