snap install core 
snap refresh core
apt-get remove certbot
snap install --classic certbot
ln -s /snap/bin/certbot /usr/bin/certbot
cd ~/
mkdir fms-ssl
cd fms-ssl/
 

nano get-ssl.sh

#!/bin/sh
# Change the domain variable to the domain/subdomain for which you would like
# an SSL Certificate
DOMAIN="fmp.domain.com"
# Change the contact email address to your real email address so that Let's Encrypt
# can contact you if there are any problems #>
EMAIL="username@domain.com"
# Enter the path to your FileMaker Server directory, ending in a slash 
SERVER_PATH="/opt/FileMaker/FileMaker Server/"
FMADMIN="fms_admin_username"
FMPASS="fms_admin_password"
#
# --- you shouldn't need to edit anything below this line
#
# WEB_ROOT="${SERVER_PATH}HTTPServer/htdocs"
WEB_ROOT="${SERVER_PATH}NginxServer/htdocs/httpsRoot"
# Get the certificate
# certbot certonly --webroot -w "$WEB_ROOT" -d $DOMAIN --agree-tos -m "$EMAIL" --preferred-challenges "http" -n
sudo certbot certonly --webroot -w "$WEB_ROOT" -d $DOMAIN --agree-tos -m "$EMAIL" --preferred-challenges "http" -n
cp "/etc/letsencrypt/live/${DOMAIN}/fullchain.pem" "${SERVER_PATH}CStore/fullchain.pem"
cp "/etc/letsencrypt/live/${DOMAIN}/privkey.pem" "${SERVER_PATH}CStore/privkey.pem"
chmod 640 "${SERVER_PATH}CStore/privkey.pem"
# Move an old certificate, if there is one, to prevent an error
# changed to server.pem as that seems to be used by fm now instead
mv "${SERVER_PATH}CStore/server.pem" "${SERVER_PATH}CStore/serverKey-old.pem"
# Remove the old certificate
fmsadmin certificate delete --yes -u ${FMADMIN} -p ${FMPASS}
# Install the certificate
fmsadmin certificate import "${SERVER_PATH}CStore/fullchain.pem" --keyfile "${SERVER_PATH}CStore/privkey.pem" -y -u ${FMADMIN} -p ${FMPASS}
# Stop FM service
sudo service fmshelper stop
# Start FM service
sudo service fmshelper start

nano renew-cert.sh

#!/bin/sh
# Change the domain variable to the domain/subdomain for which you would like
# an SSL Certificate
DOMAIN="fms.domain.com"
# Enter the path to your FileMaker Server directory, ending in a slash 
SERVER_PATH="/opt/FileMaker/FileMaker Server/"
FMADMIN="fms_admin_username"
FMPASS="fms_admin_password"
#
# --- you shouldn't need to edit anything below this line
#
WEB_ROOT="${SERVER_PATH}NginxServer/htdocs/httpsRoot"
# Move and apply the certificate to FileMaker Server
cp "/etc/letsencrypt/live/${DOMAIN}/fullchain.pem" "${SERVER_PATH}CStore/fullchain.pem"
cp "/etc/letsencrypt/live/${DOMAIN}/privkey.pem" "${SERVER_PATH}CStore/privkey.pem"
chmod 640 "${SERVER_PATH}CStore/privkey.pem"
# Move an old certificate, if there is one, to prevent an error
# changed to server.pem as that seems to be used by fm now instead
mv "${SERVER_PATH}CStore/server.pem" "${SERVER_PATH}CStore/serverKey-old.pem"
# Remove the old certificate
fmsadmin certificate delete --yes -u ${FMADMIN} -p ${FMPASS}
# Install the certificate
fmsadmin certificate import "${SERVER_PATH}CStore/fullchain.pem" --keyfile "${SERVER_PATH}CStore/privkey.pem" -y -u ${FMADMIN} -p ${FMPASS}
# Stop FM service
sudo service fmshelper stop
# Start FM service
sudo service fmshelper start

nano renew-cert-at.sh

#!/bin/sh
# Use at command to schedule FileMaker Server restart at a certain time
echo "/root/fms-ssl/renew-cert.sh" | at 01:00AM

chmod +x get-ssl.sh renew-cert.sh renew-cert-at.sh

 ./get-ssl.sh

ln -s ~/fms-ssl/renew-cert-at.sh /etc/letsencrypt/renewal-hooks/post/