I followed this fantastic tutorial and got my domain running under https succesfully. But when the certificate expires in may, what do i need to do? Do I just need to run the following command to renew it and all the...

when I setup my vps I usually secure ssh by changing the sshd_config like no root login, a ssh user..etc and also install uncomplicated firewall and fail2ban among other stuff before installing nginx and php..etc. So ...