[SSL] Let's encrypt on Cent OS (how to install)

Prerequisites

 - CentOS 

 - Apache Web Server on CentOS

 

Step 1 - Installing the Crertbot Let's Encrypt Client

$ sudo yum install epel-release
$ sudo yum install certbot python2-certbot-apache mod_ssl -y

 

Step 2 - Obtaining a Certificate

$ sudo letsencrypt

 

Step 3 - set information and select domain for ssl

 

1) set email address

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator apache, Installer apache
Enter email address (used for urgent renewal and security notices)
 (Enter 'c' to cancel): email@example.com
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org

2) agree to register 

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Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must
agree in order to register with the ACME server. Do you agree?
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(Y)es/(N)o: y

3) share your email address to EFF or not.

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Would you be willing, once your first certificate is successfully issued, to
share your email address with the Electronic Frontier Foundation, a founding
partner of the Let's Encrypt project and the non-profit organization that
develops Certbot? We'd like to send you email about our work encrypting the web,
EFF news, campaigns, and ways to support digital freedom.
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(Y)es/(N)o: n
Account registered.

4) select domain for HTTPS (SSL certifiation)

Which names would you like to activate HTTPS for?
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1: ex1.example.com
2: ex2.example2.com
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Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel): 1
Requesting a certificate for ex1.example.com
Performing the following challenges:
http-01 challenge for ex1.example.com
Waiting for verification...
Cleaning up challenges
Created an SSL vhost at /etc/httpd/conf.d/vhost-le-ssl.conf
Deploying Certificate to VirtualHost /etc/httpd/conf.d/vhost-le-ssl.conf
Redirecting vhost in /etc/httpd/conf.d/vhost.conf to ssl vhost in /etc/httpd/conf.d/vhost-le-ssl.conf

5) Congraturation. You obtained a certification

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Congratulations! You have successfully enabled https://ex1.example.com
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IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/ex1.example.com/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/ex1.example.com/privkey.pem
   Your certificate will expire on 2021-05-09. To obtain a new or
   tweaked version of this certificate in the future, simply run
   certbot again with the "certonly" option. To non-interactively
   renew *all* of your certificates, run "certbot renew"
 - 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