AFS Filesystem

Mosaic is using a distributed file system called AFS. This file system is a little different from most UNIX systems using NFS or some other distributed file system. The most important difference to the user is in the directory/file protection mechanism.

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Renew Session (XP)

This tutorial is here to help the user renew authentication tokens. An authentication token is a file that the owner carries to authorize access to a network service.

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Setting Up a Public Shared Directory

A public directory will help in sharing files with other users of the Mosaic System. The public directory can be setup in various ways but in general the idea is to allow other people to have access to your HOME directory and then also some level of write access to your public directory.

By default Mosaic accounts are setup with very restricted access, that is only you may read or write files in your directory. Others will not be able to even look in your directory - they will get a "Permission denied" message if they try.

To change this Mosaic uses Access Control Lists, ACL. Please see the page on ACL for more information on how to set permissions.

1. Setting up a shared public directory in Windows.

2. Setting up a shared public directory in Unix/Linux.

Setting up a Directory for Class

A class directory may be used by an instructor to facilitate submission of assignments. The instructor sets up a class directory for each course taught, with a subdirectory for each student in the course. When the ACLs (access control lists) are properly set, the students may deposit assignments (in electronic form) but may not look at the work of other students nor change their submissions. This allows the instructor to look at all the work and add comments and grades to the students' files.

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Securing Your Workstation

• Securing Your Workstation on a Mosaic XP System
• Securing Your Workstation on a Mosaic Sun System
• Securing Your Workstation on a Mosaic Linux System

**Lab machines may not be left unattended for more than 10 minutes, without prior approval from the Mosaic Technical Assistant on duty.