This is seems like it would be a very common configuration question, but I don't know how phrase it properly enough for Google to help.
I am using a server with NFS to serve up both home directories and a shared documents directory mounted as
/opt/shared. When a user creates a file in his home directory, I'd like the default file mode to be 600. However, if he creates a file in
/opt/shared, it should be set to 660. Is this even possible?