First of All, we need CSR file to generate SSL certificate.

When you have completed generating your CSR, cut/copy and paste it into the CSR field on the SSL certificate-request page.

To Generate a Certificate Signing Request for Apache 2.x

       $ openssl req -new -newkey rsa:2048 -nodes -keyout yourdomain.key -out yourdomain.csr

1.   Ensure that you have installed mod_ssl and it is running

2.   Upload your certificates on Instance say /home/ec2-user/ssl

3.   Edit /etc/httpd/conf.d/ssl.conf

4.   Find below lines and replace accordingly (Verify the filename and path are correct)

      SSLCertificateFile /home/ec2-user/ssl/certs/site.com.crt
SSLCertificateKeyFile /home/ec2-user/ssl/keys/site.key

      SSLCACertificateFile /home/ec2-user/ssl/ssl_files/gd_bundle.crt

5.   Restart Apache

It’s Done.