Is it possible to run wordpress mu with Sub-domains (like blog1.example.com) on a shared linux host?
If yes, how to modify the DNS?
Is it possible to run wordpress mu with Sub-domains (like blog1.example.com) on a shared linux host?
If yes, how to modify the DNS?
It depends on your host.
While you can add the wildcard subdomain on your end, Apache absolutely must have a wildcard subdomain record. if your host won't allow it or will not do it, then you need to use subfolders or find another host.