Si the certificate generate here can be used for both www and non-www?



also I wondering as well if I can use this for wildcard.

for example I have and then I will have and or I have to request for each sub domain?


You can use one certificate with one domain name per subdomain. One vHost can have one certificate.

You can create one wildcard certificate and use this with every subdomain.

Or you can create one certificate with max. 100 domain names and use it with different vHosts.