is it possible using ssh to update certificate remotely?

[it_mnews]

Hi
I'm using Let's Encrypt to apply my SSL certificate for my VSZ and I'm wondering is it possible to use ssh to update the certificate remotely?
I'm using the web interface to update this now, but for Let's Encrypt it should renew every 3 months. So I want to write a bash script to auto-renew the cert then apply to VSZ.
any idea?

thanks
Jeffrey