Install Let’s Encrypt Free SSL | Linux Administration

Install free let’s encrypt SSL certificate to enhance the security of your website. It is a free certificate authority which to enable HTTPS on your website.

Download lets encrypt library.

git clone https://github.com/letsencrypt/letsencrypt /opt/letsencrypt

Jump to /opt/letsencrypt directory.

cd /opt/letsencrypt/

Turn off the auto updates. —– OPTIONAL

./letsencrypt-auto --no-self-upgrade renew

Enter the document root path (example: /var/www/html/) and domain name (example.com) in below command for Let’s Encrypt SSL installation.

./certbot-auto --authenticator webroot --webroot-path document root of website --installer apache -d domain name

Auto Renew Of SSL Certificate.

crontab -e

Paste the below line in cron file.

15 5 * * 5 /opt/letsencrypt/certbot-auto --authenticator webroot --webroot-path document root of website --installer apache -d domain name >> /var/log/le-renew.log

The cron job we have just created will renew an SSL certificate every Friday at 5:15 A.M. by running the following script.