Q:

Unix Group Permissions

I have created a directory and chown to have permissions master:webmaster and chmod the folder to 775 hence group writeable. So why is it i bert as a member of webmaster cant mv the directory or create a file inside the directory. 

A:

To mv the directory you will need write permission on its parent.
But you ought to be able to create inside the directory; can you show us this failing?  The output of
ls -la /the/directory
id -a
touch /the/directory/file

would be most interesting.

