Mail Quotas
Each user on hans.math is subject to a 10 MB quota for their incoming
mail file (mail spool). Users' mail spools are located in
/var/mail. Users will receive a warning message when they reach 7
MB. A final notice will be sent when users exceed 10 MB. User mail
spools will be locked within 7 days of receiving the final notice.
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).
The command du -sk * will tell how much space (in kb) individual files and folders are using.
Note that using rm to delete files does not necessarily reduce quota. See Deleting Files for further information.
If it is determined that after cleaning the account and compressing files that a larger quota is necessary, please send your request to quotas @ math . upenn . edu
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.
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
In addition, a one-time dissertation supplement of 300 pages is available.
More information on printer usage can be found in the Printer Usage Guidelines document under Print Quotas.
Security
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 the
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 the
manager AT math . upenn . edu immediately.
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.
If a system manager asks you to discontinue any activity on the system, you must stop or risk account deactivation.
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.
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.
Privacy
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.
Accessing Other Computers
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.
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.
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.
Misbehavior
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.
Other misbehavior may violate the University's general policies, the Pennsylvania Computer Crime Act of 1983, the University's Acceptable Use Policy or other applicable laws.
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).
Processor Time and Memory
There are no strictly enforced limits on CPU or memory usage. Users are
asked, however, to run 'intensive' processes on the linux terminals
and not on hans.math. 'Wild' processes found on hans may be
niced or killed by the system administrator.
To run processes remotely, users should connect to the remote linux
terminal with X-forwarding using: ssh -X
Idle Session Logout
Idle login sessions may be automatically terminated after 14 days, or
sooner for machines in the public labs.
File Backup and Retrieval
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 zap.html for details.
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 Server Backup Procedure for more information.
Automated Enforcement and Other Policies
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.
Page last updated: March 07, 2003