CentOS7-SSL Certificates (Let’s Encrypt)

yum --enablerepo=epel -y install certbot

certbot certonly --webroot -w /var/www/html -d [這裡輸入申請的DomainName]

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Enter email address (used for urgent renewal and security notices)
 (Enter 'c' to cancel): [root@DomainName]
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org

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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 at
https://acme-v02.api.letsencrypt.org/directory
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(A)gree/(C)ancel: A

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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: Y

Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for [DomainName]
Using the webroot path /var/www/html for all unmatched domains.
Waiting for verification...
Cleaning up challenges
Subscribe to the EFF mailing list (email: [root@DomainName]).
Starting new HTTPS connection (1): supporters.eff.org

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/(FQDN)/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/(FQDN)/privkey.pem
   Your cert will expire on 2021-01-17. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot
   again. 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

certbot renew