AlmaLinux 10

How to Install Let's Encrypt SSL in Nginx on AlmaLinux 10

To install Let's Encrypt SSL on Nginx on AlmaLinux 10, follow the steps below:

Step 1 : Make sure the domain name is already pointed to the server's public IP address. This is required for Let's Encrypt to verify domain ownership.

Step 2 : Update system packages.

sudo dnf update -y

Step 3 : Install Certbot and the Nginx plugin.

sudo dnf install certbot python3-certbot-nginx -y

Check the installed version:

certbot --version

Step 4 : Create a configuration file for the domain.

sudo nano /etc/nginx/conf.d/example.devtutorial.io.conf

Example configuration:

server {
    listen 80;
    server_name example.devtutorial.io;

    root /var/www/example.devtutorial.io;
    index index.html;

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

Save and close the file.

Step 5 : Create the website directory:

sudo mkdir -p /var/www/example.devtutorial.io

Create an index.html file:

sudo nano /var/www/example.devtutorial.io/index.html

Example content:

<!DOCTYPE html>
<html>
<head>
    <title>example.devtutorial.io</title>
</head>
<body>
    <h1>Nginx is working correctly</h1>
</body>
</html>

Set ownership:

sudo chown -R nginx:nginx /var/www/example.devtutorial.io

Step 6 : Check the configuration syntax.

sudo nginx -t

Step 7 : Apply the configuration changes.

sudo systemctl restart nginx

Step 8 : Request and install the SSL certificate.

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

During the process:

- Enter email address : Enter a valid email address.

- Agree to the Terms of Service : Type y.

- Share your email address : Type y or n.

- Successful installation : Certbot displays a message confirming the certificate was issued and installed.

Step 9 : Test the automatic renewal process.

sudo certbot renew --dry-run

Step 10 : Open a browser and access:

https://example.devtutorial.io

The website should load with HTTPS enabled.

Congratulations, you have successfully installed a Let's Encrypt SSL certificate on Nginx running on AlmaLinux 10.