General Rules for CDF Users
		---------------------------

Here are some of the basic rules that apply to all users on CDF.
They are the basis on which your CDF account is entrusted to you,
and it is important for you to understand them.

Your account is provided for your use only, and only to support your
computing education. Your use of CDF must not annoy or offend other
CDF users or account-holders, nor threaten the security or operation
of this or any other computing system. If you break these rules, you
may be penalized by temporary or permanent loss of your account or
deletion of files associated with it. For some offences there may also
be implications under the University's Code of Behaviour on Academic
Matters, or under the Code of Student Conduct (which governs non-
academic offences). It is also possible to misuse your account in
ways that are actually criminal and involve real legal penalties.
However, here we will concentrate on the implications within the
University, where the possible sanctions range from loss of your
CDF account to expulsion from the University.

Some of the rules that are not described at length here are
consequences of the basic ideas outlined in the previous paragraph.
For example, it is forbidden bring any food or drink in the workstation 
rooms because this not only annoys other users but in fact threatens the
operation of the system by the possibility of damaging the equipment
-- if not directly, then indirectly through the actions of our resident
vermin.

What follows is a longer discussion of these rules. You will notice
that some details differ depending on whether they are being applied
to program accounts or to course-related accounts.

1. Account-sharing is forbidden. You must not use anyone else's account,
   and you must not allow anyone else to use your account. The only
   exceptions are in cases where sharing is explicitly required by a
   course; the course instructor will then provide instructions on how
   you should proceed.

   In cases of account-sharing contrary to the rules, the accounts of
   BOTH users may be suspended.

   To make it harder for others to misuse your account, you must change
   the password you were initially given. If you don't do that, your
   account will be suspended a few weeks into the term. (In fact, your
   account was probably set up to force you to change your password.)

2. Use of your account to attempt entry to accounts of which you are not
   a legitimate user, on this or any other computing system, will be
   dealt with very severely. Any evidence that your account has been or
   is being used for this type of activity will be considered sufficient
   grounds for its immediate suspension. Your account will only be
   reactivated if you can provide a convincing explanation to establish
   your innocence.

   More generally, you may not use CDF to misrepresent or obscure your
   identity. For example, you must not send e-mail or post news that
   purports to come from someone else.

3. You must use your account only for its intended purpose. You may use
   it for work on CDF-based courses you are enrolled in, or to advance
   your understanding of computer science in general. Extensive use of 
   your account for other activities, except as permitted under rule 4,
   is strictly prohibited.

   You must actually be enrolled in a CDF based course or program to keep
   your account. When you withdraw from all the courses or a program, you
   may not continue to use your account.

4. However, you may use your account for other purposes such as reading
   news, playing games or exchanging information not directly related to
   your computing education, provided that such activities do not interfere
   with other users' legitimate uses of CDF.

   No matter what resource you are using, you should use it responsibly so
   as not to deprive other users of their share. For example, when you are
   absent from a workstation for more than a couple of minutes, you should
   vacate it so that someone else can log in (rather than having a friend
   "occupy" the workstation with occasional key-presses). And if the site
   is busy, you may not use more than one console at a time. ("Use" means
   not only logging in, but typing on the keyboard or using a mouse on
   behalf of a friend.)

   Note that there are special rules covering the playing of games using
   CDF. Before you engage in game playing, see "rules -g" for the
   rules governing these activities.

5. Your use of your account, and your activities in the workstation rooms,
   must not threaten or annoy other users. You must not make excessive
   noise, for example, whether by conversation or by output from a program.
   It is all too easy to forget that other people are forced to listen to
   your audio output, if you're used to computing in private.

   Others can see your screen, too. Threatening or offensive images can
   cause a very unfriendly atmosphere in the workstation room.  Display
   an image only if you are sure no reasonable person could be offended.
   When in doubt, don't display it.

6. The files associated with your account belong to the University of
   Toronto. These files include not only the files located in your home
   directory but also electronic mail files and any others that may happen
   to be connected with your account.

   The University ordinarily leaves the management of these files up to you.
   However, there is no presumption of privacy here, and your files
   (including electronic mail) may be read, altered or removed by your
   course instructors or tutors, CDF system administrators, or other
   appropriate officials of the Department of Computer Science or the
   University of Toronto. Such actions are unusual, and take place only
   where there is reason to suspect an infraction of the rules.

   Files associated with the intended uses of your account will generally
   be left intact. However, files associated with supplementary uses, as
   discussed in rule 4 above, may be removed without warning or explanation.

7. The computational resources of CDF are shared just like the file-
   storage resources. However, you will only need to worry about this
   if you have work to do that requires heavy computation - a "compute-
   intensive job." These jobs can be run either on your workstation or
   on "cdf," the CDF compute servers. "cdf" is actually made up of three
   servers, and whilst these servers can be used for compute-intensive 
   jobs, please remember that these servers serve the Sun X-terminal
   computers, and students working from home.
   
   The three servers making up "cdf" are werewolf, seawolf and skywolf.
   An attempt is made to try to balance the load on the servers, so please
   do not choose one of them exclusively to run your compute-intensive 
   jobs.  Rather check what the load is before starting a job.

   These rules are intended to prevent these jobs from interfering with
   others' use of the workstations:

a) You may run a job on a workstation where you are not located, but
   your job must not cause problems for users logged in to the console.
b) Background jobs (jobs left running after the user logs out) should be
   run only on one of the servers making up "cdf".
c) A background compute-intensive job should relate to your studies in
   Computer Science at U of T, and if asked by the system administrators,
   you should be prepared to justify execution of the job in this context.
d) You may not run more than two instances of a compute-intensive job on 
   one of the servers at a time.
e) All non-interactive compute-intensive jobs on "cdf" must be niced (run
   with the "nice" command).
f) If a job runs for more than 5 minutes, and it has not not been niced, 
   the system administrators reserve the right to either stop the job or
   renice it.  You are still responsible for nicing your own jobs.

   The workstations have limited CPU and memory. Rules (a) and (b) are
   intended to put them at the disposal of the user at the console.

   Rule (c) means that we do not consider we have the computing resources
   to participate in Internet-wide projects such as SETIathome or DES
   Cracker, which use lots of CPU cycles but would rarely be integral to
   completing a Computer Science program.

   Rules (d) to (f) recognize that the servers making up "cdf" are  shared 
   machines. 

   These rules are not absolute. In some circumstances, and at some times
   of the year, you may be able to convince the system administrators
   that your proposed computational activities will not seriously affect
   other users, and in that case you may be given permission to break
   rules (b),(c) and (d). Send e-mail to admin@cdf to discuss this.

The rules above are intended to ensure that CDF can provide a useful
computing environment to its legitimate users, the students in CDF-based
courses. To be certain that that goal is attained, appropriate penalties
may be applied without regard for their effect on an offender's course
work, even in CDF-based courses.

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