bash -c "cat > /etc/letsencrypt/renewal-hooks/post/20-restart-nginx.sh"<<EOF
#!/bin/bash
if systemctl restart nginx.service; then
logger "NGINX restarted cleanly after Certbot renewed its cert(s)"
else
logger "NGINX failed to restart cleanly after Certbot renewed its cert(s)"
fi
EOFMake sure to update the script's mode
chmod u+x /etc/letsencrypt/renewal-hooks/post/20-restart-nginx.sh