Ubuntu Server 23.10

How to Install Let's Encrypt SSL in Nginx on Ubuntu 23.10

Installing Let's Encrypt SSL on Nginx in Ubuntu 23.10 involves a few steps. Here's a step-by-step guide:

Step 1 : Update Packages

Make sure your package list is up to date.

sudo apt update

Step 2 : Install Certbot

Certbot is a command-line tool provided by Let's Encrypt to obtain and renew SSL certificates.

sudo apt install certbot python3-certbot-nginx

Step 3 : Allow Nginx Through the Firewall

If you have a firewall enabled, make sure to allow Nginx traffic.

sudo ufw allow 'Nginx Full'

Step 4 : Create an Nginx configuration.

sudo nano /etc/nginx/sites-available/example.devtutorial.io

Add the following configuration, adjusting it according to your needs. This example assumes a basic Nginx configuration:

server {
    listen 80;
    server_name example.devtutorial.io;
    root /var/www/html;

    location / {
        try_files $uri $uri/ =404;
    }
}

Save the file and exit the text editor.

Step 5 : Create a Symbolic Link

Create a symbolic link to enable the site:

sudo ln -s /etc/nginx/sites-available/example.devtutorial.io /etc/nginx/sites-enabled/

Step 6 : Test Nginx Configuration

Before restarting Nginx, ensure that your configuration is error-free:

sudo nginx -t

If you see "syntax is okay" and "test is successful," you can proceed.

Step 7 : Restart Nginx

Restart Nginx to apply the changes:

sudo systemctl restart nginx

Step 8 : Obtain SSL Certificate

Run Certbot to obtain a certificate. Replace example.devtutorial.io with your domain.

sudo certbot --nginx -d example.devtutorial.io

- Certbot will prompt you to enter an email address for renewal and security notices.

- Agree to the Terms of Service:

- Share Email Address:

Certbot will automatically configure Nginx to use the obtained SSL certificate. Once the process is complete, Certbot will provide a summary of the changes made.

Step 9 : Test the Renewal Process

sudo certbot renew --dry-run

Step 10 : Test Your Site:

Visit your website using https:// to ensure that the SSL certificate is working correctly

Certbot has now obtained and installed an SSL certificate for your Nginx server, and your site should be accessible over HTTPS