chgrp permanently for a directory

I'm running a CentOS 5.0 server with root access. The /var/www folder was originally set recursively with root as the owner and group. So I did a chgrp -R webdevs /var/www and a chmod -R g+rwx /var/www command to give all members of the webdevs group read/write access. These changes work as required for all preexisting files. However, when user examplewebdev creates a new file in the /var/www directory, the group defaults to examplewebdev instead of 开发者_如何转开发webdevs. How do I change the defaults for new file creation?

Try to play with ACLs: man setfacl.

http://www.vanemery.com/Linux/ACL/linux-acl.html#default

I use 'newgrp' command but I think it applies only in the shell you are currently in.