Installing purchased SSL certificate on nginx (Ubuntu)

There are several posts detailing how to install Lets Encrypt certificates on nginx. Recently, we were provided with a purchased certificate from one of the Certificate Authorities.

Below are the steps to update the nginx config file to utilize the purchased SSL certificate. (on Ubuntu)

Setting up SSL cert with nginx

1. Copy the .crt file and encrypted .key file to nginx server
2. Decrypt the .key file

openssl rsa -in encrypted.key -out decrypted.key

4. Concatenate the .crt and and encrypted .key file

cat domain.crt encrypted.key > domain.pem

5. Update nginx config file and add the following lines

 ssl_certificate /etc/ssl_certs/domain.pem;
 ssl_certificate_key /etc/ssl_certs/decrypted.key;

6. Check nginx config

nginx -t

7. Reload nginx

systemctl reload nginx

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