I am new with this SSL.
I have a webhosting server with Ev1.
and now i have some customers that wants to get SSL on their site.
Do i buy the SSL certificate and install it on my hosting server and just pay for one license FEE? and be able to provide to all my customers?

For example: I buy RapidSSL and it cost $14 for one year FEE
now can i provide the SSL to all the customers who host on my server?

Thank you guys.

What control panel are you using? That will make a bit of a difference in how this works... but, as far as I am aware, most of the panels EV1 offers allow you to buy a generic SSL certificate for the server and let all of your customers use it.

For example, you could buy a cert for:
server-name.yourdomain.com

And then your customers would be able to access pages on their sites as:
https://server-name.yourdomain.com/~username/blah.html

They won't, however, be able to use
https://www.theirname.com
without buying a seperate certificate for each (and this would also require a dedicated, seperate IP address for each site as well).

And if you have more than one server, you'll have to buy one certificate for each server.