File Sharing

Sharing of files on multi-user systems is desirable.

Sharing may be done through a protection scheme.

On distributed systems, files may be shared across a network.

Network File System (NFS) is a common distributed file sharing method.

Protection

File owner/creator should be able to control:

  1. what can be done

  2. by whom

Types of access

  1.  Read

  2. Write

  3. Execute

  4. Append

  5. Delete

  6. List