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<H1> Math Unix Systems Acceptable Use Policy </H1>
<H2>Table Of Contents</H2>
<UL>
<LI><A HREF="#overview">Overview</A>
<LI><A HREF="#d_quotas">Disk Quotas</A>
<LI><A HREF="#p_quotas">Print Quotas</A>
<LI><A HREF="#security">Security</A>
<LI><A HREF="#privacy">Privacy</A>
<LI><A HREF="#other_computers">Accessing Other Computers</A>
<LI><A HREF="#misbehavior">Misbehavior</A>
<LI><A HREF="#limits">Processor Time and Memory</A>
<LI><A HREF="#idle">Idle Session Logout</A>
<LI><A HREF="#backup">File Backup and Retrieval</A>
<LI><A HREF="#automated">Automated Enforcement and Other Policies</A>
</UL>
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<A HREF="../Help/" TARGET="_top">Back to Front Page</A>
<A NAME="overview"><H1>Overview</H1></A>
<A HREF="http://www.sas.upenn.edu/computing/">SAS
Computing</A> operates and administers several UNIX workstations used
by the <A HREF="/">Math Department</A> faculty, staff, and students.
These machines include:
<UL>
<LI> <B>hans</B>, a <A
HREF="http://www.sun.com/desktop/products/Ultra2/">Sun
Ultra 2 model 2200</A> running Sun Solaris Unix
<LI> 45 Linux-terminals
<LI> several NCD X Terminals
<LI> four Sun Ultra 10 machines
</UL>
This document will refer to this group of machines as the <B>Math Unix
Systems</B>.
<P>
<A HREF="#top">Return to top</A>
<A NAME="d_quotas"><H2>Disk Quotas</H2></A>
Each account has a quota of 60 megabytes of disk storage (for faculty,
120MB). Users who
exceed this limit for over 7 days will have all write privileges to
their account turned off until below quota.
<P>
If you are over quota when you log into your account, you will see a
message indicating the amount you are over quota, as well as the
amount of time left before the above restrictions take place. You
will also see a warning during your session if you exceed quota (on
hans and graphics only).
<P>
The command <B>quota_total</B> will tell how much space you are
currently using. If you are having problems finding large files, try
the following command:
<P>
<tt>du -sk .[A-z] [A-z]|sort -n</tt>
<P>
Note that using <B>rm</B> to delete files does not necessarily reduce
quota. See <A HREF="zap.html">Deleting Files</A> for further information.
<P>
If it is determined that after cleaning the account and compressing
files that a larger quota is necessary, please send your request to
<TT>quotas AT math . upenn . edu</TT>
<P><A HREF="#top">Return to top</A>
<A NAME="p_quotas"><H2>Printer Quotas</H2></A>
Users have a per-semester allocation of pages they may print, based on
the following classifications:
<P><PRE>
CLASSIFICATION PAGES
Math Graduate Students who are teaching 400
Math Graduate Students who are not teaching 300
TAs who are not Mathematics Graduate Students 150
Undergraduates 100
Guests (includes Math Graduate Students on leave) 100
</PRE>
<I>REMARK: Here, the summer is counted as a third semester. The
"teaching" status only applies to the semesters in which one is
teaching. For many TAs, it will not apply for the summer.</I>
<P>
In addition, a one-time dissertation supplement of 300 pages is
available.
<P>
More information on printer usage can be found in the <A
HREF="print.html#quotas">Printer Usage Guidelines</A> document.
<P><A HREF="#top">Return to top</A>
<A NAME="security"><H2>Security</H2></A>
Your computer account is for your use only. You are solely responsible
for what is done using it. If there is evidence of unauthorized or
improper use of your account (including account sharing), it may be
temporarily disabled. This protects your files and other users of the
system. You will be asked to contact
manager AT math . upenn . edu, change your
password, and/or take other appropriate action. If you suspect that
someone else may be using your account, report it by contacting
manager AT math . upenn . edu <B>immediately</B>.
<P>
Choose a password that will be difficult to guess and keep it a
secret. Your password belongs to you alone. Don't even give your
password to a friend or to a computer system administrator.
<P>
If a system manager asks you to discontinue any activity on the
system, you <B>must</B> stop or risk account deactivation.
<P>
Log out when you are finished at a terminal. If you don't, other
people can use your account, change or delete your files, and so on.
<P>
No computer system is immune to forgeries or spoofs. Don't take any
irreversible action based on electronic communication alone. In
particular, don't believe everything you read on April Fools' Day.
<P><A HREF="#top">Return to top</A>
<A NAME="privacy"><H2>Privacy</H2></A>
Read other people's files only if you have permission from the owner
to do so. This applies to both protected and unprotected files. On
the other hand, complete privacy cannot be guaranteed. Never store
files on any time-sharing system whose disclosure would be disastrous.
The system manager will only view users' files under exceptional
circumstances, such as the appearance of abuse, for required system
maintenance, or in response to a question or request from the user.
<P><A HREF="#top">Return to top</A>
<A NAME="other_computers"><H2>Accessing Other Computers</H2></A>
Only attempt to connect to other computers if you have reason to
believe that the owner wants you to connect. This includes http
(World Wide Web), telnet, ftp, login, and any other method. If you
are requested to stop connecting to certain computers, you must stop.
<P>
You may not run any server program which accepts incoming connections
to any of the Math Unix Systems. Failure to comply with any of these
rules may result in suspension of your account privileges.
<P>
All outside connections go through the Internet, and some machines on
the Internet have very strict policies. Since our university
connection can be terminated by Internet authorities if there is
evidence of abusive use of the connection, SAS is very strict about
even the appearance of abuse.
<P><A HREF="#top">Return to top</A>
<A NAME="misbehavior"><H2>Misbehavior</H2></A>
Forged mail, attempts to use other people's accounts (including
superuser), attempts to crack passwords, attempts to alter system
files, and similar misbehavior may be referred to the University
Judicial Inquiry Office.
<P>
Other misbehavior may violate the University's general policies, the
Pennsylvania Computer Crime Act of 1983, the University's <A
HREF="http://www.upenn.edu/passport/policies.html#ethical">Policy on
Ethical Behavior with Respect to the Electronic Information
Environment</A> or other applicable laws.
<P>
Any activity which denies or restricts service to other users of the
Math Unix Systems or any other computer is strictly forbidden. This
includes harassment by repetitive email, electronic chain letters,
talk, write, or any other means. Harassment by computer falls under
the university's general policy. Severe or repeated harassment will be
referred to the Ombudsman's Office. Any concerns about this may be
discussed in a confidential manner with the Ombudsman's Office
(898-8261).
<P><A HREF="#top">Return to top</A>
<A NAME="limits"><H2>Processor Time and Memory</H2></A>
Since a primary function of the Math Department Unix Systems is for
research applications, there are no limits on processor time or
memory.
<P>
The only request is that on <B>hans.math</B>, out of consideration for
other users, no more than three long CPU-intensive processes be run by
the same user during weekday "business hours" (Monday through Friday,
9:00am to 4:00pm) without being "niced". Please contact
manager AT math . upenn . edu if you would like
assistance with running CPU-intensive processes during off-peak hours.
<P><A HREF="#top">Return to top</A>
<A NAME="idle"><H2>Idle Session Logout</H2></A>
Idle login sessions may be automatically terminated after 14 days, or
sooner for machines in the public labs.
<P><A HREF="#top">Return to top</A>
<A NAME="backup"><H2>File Backup and Retrieval</H2></A>
If you delete a file by mistake, you can restore it yourself if you do it
promptly. Deleted files remain on the system until early the next
morning. See <A HREF="zap.html">zap.html</A> for details.
<P>File retrieval service is available for occasional accidental
deletions of critical files. Retrieving data is time and labor
intensive, so these services are limited, and subject to the judgment
of system administration personnel. See <A HREF="backup.html">Server
Backup Procedure</A> for more information.
<P><A HREF="#top">Return to top</A>
<A NAME="automated"><H2>Automated Enforcement and Other Policies</H2></A>
Some of the stated policies and limits are automatically enforced, and
others manually at the discretion of the administrative personnel.
Even if the automatic enforcement programs are circumvented, the
policies still apply. There is a policy for use of the the NSFnet
(our connection to most non-Penn computers), available from SAS. The
University's general policies apply to computers, such as the policy
on commercial use of facilities, guidelines on open expression, and
the code of academic integrity.
<P>
<A HREF="#top">Return to top</A>
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