Large number of users, but want to keep secret

[Corey Bettenhausen]

Soo-Hyun Choi wrote:
> Hi,
> 
> I have fairly large number of students (> 50) in a class. I would like to
> give them an account on a machine (Ubuntu 7.10, AMD Athlon XP 2600+, 1.5 GB
> Memory). But, I want that the students cannot read each other's files in
> order to prevent from copying someone else's programming assignment by
> reading it.
> 
> What would be a good way to do this?
Set the permissions to each student's home directory appropriately.  See 
this page under the "File Permissions" heading:
https://help.ubuntu.com/7.10/user-guide/C/gosnautilus-8.html

Or "man chmod" from the commandline.  Another somewhat related command 
is "chown".  For more information on that one, "man chown" from the 
commandline.  This page may also come in handy:
https://help.ubuntu.com/community/FilePermissions
Regards,
-Corey