centOS - vsftpd - multiple users different permissions
I am using centOS 6.3. I have installed vsftpd on it.
Now I want to create multiple users with different permissions on it.
Example - user A should create, edit and delete directories in /var/www/html.
user B should upload files in sub-directories of /var/ww/html only, He must not create or delete the sub-directories of /var/www/html.
How to create different users with different permissions.