Letsencrypt.org

Let's Encrypt Free SSL Certificates

Let's Encrypt - Free SSL/TLS Certificates

Let’s Encrypt is a free, automated, and open Certificate Authority.

Site: http://letsencrypt.org

Getting started

https://letsencrypt.org/getting-started/

certbot

Ubuntu

Install:

sudo apt-get update
sudo apt-get install software-properties-common
sudo add-apt-repository universe
sudo add-apt-repository ppa:certbot/certbot
sudo apt-get update

sudo apt-get install certbot python-certbot-apache

Auto install certificates:

sudo certbot --apache

Or just get a certificate:

sudo certbot certonly --apache

Test automatic renewal:

sudo certbot renew --dry-run

ref: https://certbot.eff.org/lets-encrypt/ubuntubionic-apache

CentOS

Install:

wget https://dl.eff.org/certbot-auto
sudo mv certbot-auto /usr/local/bin/certbot-auto
sudo chown root /usr/local/bin/certbot-auto
sudo chmod 0755 /usr/local/bin/certbot-auto

Auto install certificates:

sudo /usr/local/bin/certbot-auto --apache

Or just get a certificate:

sudo /usr/local/bin/certbot-auto certonly --apache

Automatic renewal: (crontab)

echo "0 0,12 * * * root python -c 'import random; import time; time.sleep(random.random() * 3600)' && /usr/local/bin/certbot-auto renew" | sudo tee -a /etc/crontab > /dev/null

ref: https://certbot.eff.org/lets-encrypt/centos6-apache

Renewal

/path/to/certbot-auto renew --dry-run
/path/to/certbot-auto renew

Autoamted Renewal:

0 0,12 * * * python -c 'import random; import time; time.sleep(random.random() * 3600)' && /path/to/certbot-auto renew

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/test.t0e.org/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/test.t0e.org/privkey.pem
   Your cert will expire on 2019-04-30. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot-auto
   again with the "certonly" option. To non-interactively renew *all*
   of your certificates, run "certbot-auto renew"
 - Your account credentials have been saved in your Certbot
   configuration directory at /etc/letsencrypt. You should make a
   secure backup of this folder now. This configuration directory will
   also contain certificates and private keys obtained by Certbot so
   making regular backups of this folder is ideal.
 - If you like Certbot, please consider supporting our work by:

   Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
   Donating to EFF:                    https://eff.org/donate-le