https://qiita.com/sugimount/items/3f43c55141252f8f2968
https://qiita.com/cocotaro0202/items/18f5eeefed140060324d
OS: Ubuntu24
sudo apt update
sudo apt install software-properties-common -y
sudo add-apt-repository universe
sudo apt install certbot -y
sudo certbot certonly \
--key-type rsa \
--manual \
--domain example.com \
--email hoge@example.com \
--agree-tos \
--manual-public-ip-logging-ok \
--preferred-challenges dns
下記内容で、TXTレコードを作成
GoogleAdmin Toolboxで反映されたことを確認
エンター
_acme-challenge.example.com.
a945JkniTrG-VwaYWRyNKauGx_H53_czK9U_8dLOKBs
Certificate is saved at: /etc/letsencrypt/live/example.com/fullchain.pem
Key is saved at: /etc/letsencrypt/live/example.com/privkey.pem
sudo su -
ls -l /etc/letsencrypt/live/example.com
lrwxrwxrwx 1 root root 41 Jul 3 11:46 cert.pem -> ../../archive/example.com/cert1.pem
lrwxrwxrwx 1 root root 42 Jul 3 11:46 chain.pem -> ../../archive/example.com/chain1.pem
lrwxrwxrwx 1 root root 46 Jul 3 11:46 fullchain.pem -> ../../archive/example.com/fullchain1.pem
lrwxrwxrwx 1 root root 44 Jul 3 11:46 privkey.pem -> ../../archive/example.com/privkey1.pem
-rw-r--r-- 1 root root 692 Jul 3 11:46 README
ls -l /etc/letsencrypt/archive/example.com
-rw-r--r-- 1 root root 1281 Jul 3 11:46 cert1.pem
-rw-r--r-- 1 root root 1566 Jul 3 11:46 chain1.pem
-rw-r--r-- 1 root root 2847 Jul 3 11:46 fullchain1.pem
-rw------- 1 root root 241 Jul 3 11:46 privkey1.pem
/etc/letsencrypt/live/example.com/cert1.pem
/etc/letsencrypt/live/example.com/privkey1.pem
