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Ubuntu Server 18.04 ; Obtain an SSL certificate (Let's Encrypt).

Obtaining a certificate with Let's Encrypt

①Enable mod_ssl

②Install Git.

③Install the certificate acquisition tool

Certbot" is now installed under /usr/local/certbot.

④Install the certificate

# Registration of e-mail address and agreement to terms of use are required for the first time only.
# Specify an email address to receive

Success when displaye ""Successfully received certificate"

# The following certificate is obtained under [/etc/letsencrypt/live/<FQDN>/] as described in the message
# cert.pem ⇒ SSL server certificate (including public key)
# chain.pem ⇒ intermediate certificate
# fullchain.pem ⇒ File containing cert.pem and chain.pem combined
# privkey.pem ⇒ private key