機能 
 構成・方式 
 タスク 
    証明書更新 
    更新自動化 
    証明書の削除 
    サーバー移転 
 Certbot導入 

  証明書更新
 ・# ./certbot-auto renew
更新するほど古くないのでスキップ 　　　　Saving debug log to /var/log/letsencrypt/letsencrypt.log 　　　　- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 　　　　Processing /etc/letsencrypt/renewal/www.it-o.net.conf 　　　　- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 　　　　Cert not yet due for renewal 　　　　- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 　　　　The following certs are not due for renewal yet: 　　　　 /etc/letsencrypt/live/www.xxxx.xxx/fullchain.pem expires on 2020-01-19 (skipped) 　　　　No renewals were attempted. 　　　　- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 更新の自動化
 ・cronを設定（毎月1日、4:00の更新例）
0 4 1 * * /usr/local/certbot/certbot-auto renew ＆＆ /bin/systemctl reload httpd 

 証明書の削除
 ・# ./certbot-auto delete -d xxxx.jp 　　　　Upgrading certbot-auto 1.7.0 to 1.8.0... 　　　　Replacing certbot-auto... 　　　　Creating virtual environment... 　　　　Installing Python packages... 　　　　Installation succeeded. 　　　　Saving debug log to /var/log/letsencrypt/letsencrypt.log 　　　　Which certificate(s) would you like to delete? 　　　　- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 　　　　1: xxxx.jp 　　　　- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 　　　　Select the appropriate numbers separated by commas and/or spaces, or leave input 　　　　blank to select all options shown (Enter 'c' to cancel): 　　　　- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 　　　　Deleted all files relating to certificate www.xxxx.jp [root@fe12 certbot]# ./certbot-auto delete -d it-circle.net Upgrading certbot-auto 1.8.0 to 1.10.1... Replacing certbot-auto... Creating virtual environment... Installing Python packages... Installation succeeded. Saving debug log to /var/log/letsencrypt/letsencrypt.log Which certificate(s) would you like to delete? - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1: www.it-circle.net - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Select the appropriate numbers separated by commas and/or spaces, or leave input blank to select all options shown (Enter 'c' to cancel): - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The following certificate(s) are selected for deletion: * www.it-circle.net Are you sure you want to delete the above certificate(s)? - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (Y)es/(N)o: Yes Deleted all files relating to certificate www.it-circle.net. [root@fe12 certbot]#
 別のサーバーに移転
 ・旧サーバーから引き継ぐ
 ・/etc/letsencrypt を移転する。
 ・Certbot導入
0 4 1 * * /usr/local/certbot/certbot-auto renew ＆＆ /bin/systemctl reload httpd