Query: "i m thinking of shifting my file server on linux....n i m nt able to block mp3 files and .extension files being copied from the file server.
Put these files into a directory, then set permission of that directory into exclusive: do this--
user@host--$: mkdir mymp3
user@host--$: chmod 700 ./mymp3
that way you alone can open the directory and read its contents. BTW, reload services in order for new permission to take effect.
Do not share those files, exclude them from the shared folders.
Hope this helps.