Printing Service
Written by Scott Ostrander   
Thursday, 02 February 2006 08:54

The School of Computing uses a Common Unix Printing System (CUPS) server to manage printing, using the Internet Printing Protocol (IPP). CUPS provides both lpr and lp style client commands under Unix.

The main public printer is csps for single sided printing, and csduplex for double sided. The printer is located in MEB 3153.

Various research groups, labs and grad student areas have printers available for their use. You can find out more than you probably want to know using the printer web page ( Only accessible from machines within the School of Computing ) or the lpstat command:

lpstat -t

Ignore the bogus date fields. The lpstat man page explains more options. Various printer options, defaults and such can be set using the lpoptions command. For example, to make grduplex your default printer, you would run the command:

lpoptions -d grduplex

With a default destination printer set, you can just do "lpr filename" instead of "lpr -Pgrduplex filename"

Documentation for the CUPS system is available via the web.


On systems running Windows, the printers are available through cups using the form

You may need someone with admin privleges to add the printer and share it before regular users can make use of it.


On Macintosh systems, open the Print & Fax preference pane.  In the dialog set the protocol to "IPP" and in the Address (Printer on older Macs) field enter:

In the Queue (Spool on older Macs) field enter:


In the Name field, you can name this printer entry to anything you'd like.

Configuring a Self Administrated UNIX System Using CUPS

There are two quick methods to allow a UNIX system within the SoC network to access the CUPS server.  If you wish to make the change globally for all users of the system, edit the/etc/cups/client.conf file and add the line:


If you only wish to make the change for your user account on a UNIX system, simply set the $CUPS_SERVER environment variable to "".

Cups documentation.

Printer Status
       [ Only available from machines within School of Computing ] 

If you have troubles with printing, first make sure it isn't something obvious like the printer out of paper, jammed, offline or the network cable unplugged. If there is a non-obvious problem, send a message describing the trouble in detail to This email address is being protected from spambots. You need JavaScript enabled to view it..

Written by Scott Ostrander   
Thursday, 02 February 2006 08:47
## University of Utah, School of Computing
## ntp.conf- xntpd configuration file
## Written by: Chad Lake 12/8/97
## Updates:

## This means that this host will get it's time
## information from these servers:

## this is the driftfile
driftfile = /etc/ntp.drift
Written by Scott Ostrander   
Thursday, 02 February 2006 08:27

Miscellaneous Frequently Asked Questions

  • I sent email to support@cs for help with the Visual Supercomputing Center, but no one helped me.

The VSC is not managed by the CS department facility staff. Please email This email address is being protected from spambots. You need JavaScript enabled to view it. , and they'll be more than happy to take care of your needs.


  • I tried to FTP with my facility username to, but it doesn't work. What gives?!? is for anonymous FTP only. To use authenticated FTP, please use The system is set up this way for security reasons. Note that this is only available from internal networks. Please see the SCP/SFTP FAQ for details on how to transfer files through the firewall.



  • After I log in to a Unix box, I can't run programs like pine, emacs or anything else I need. What is going on?

You probably don't have the directories containing common programs. In addition to standard system directories, like /bin, and /usr/bin, you probably want /uusoc/opt/bin in your $PATH variable.

If you are using csh or tcsh, you can set the path as follows:

set path = ( $path )

Bourne or ksh users can set the path via:

PATH=$path: ; export PATH

If you want to make the changes permanent, modify your .cshrc for csh or tcsh or your .profile for Bourne or ksh.


  • I have a question regarding a class I'm taking, whom should I mail?

You should email your professor or your TA(s). You should not email support. We are not necessarily familiar with the software and/or lessons being used in the class.


  • Why do I get a permission denied error when trying to delete a file via Unix when all the permissions are set correctly?

The reason that this happens is due to our netapp boxes supporting both the Windows and Unix worlds. If a you have a file 'FOO' open under Windows and you try to delete 'FOO' under Unix you will get a permission denied message. This is because the Netapp box sees that another program under Windows is using the file 'FOO' and will stop you from deleting it. If you really want to delete the file shut down any Windows apps that are using the file 'FOO' and then delete 'FOO'.


  • How do I get support for the scanner/copier in MEB 3401 ?

    The Imagistics DL850 was purchased by the front office with an outside support contract and we have no special access to it.  For any issues please contact the front office for assistance.


  • My question isn't covered here, is there anywhere else I can go?

Yes, we have more detailed FAQs covering each service we offer (some are still being written and/or updated.) Please go to the main support page and look under the FAQ heading. If your question isn't answered there, feel free to email us.

Door Lock/Room Access FAQ
Written by Todd Green   
Thursday, 13 December 2007 05:03

The following rooms are managed by the School of Computing Facility.



2172, 3105, 3115, 3133, 3143, 3145, 3161, 3167, 3325, 3345, 3349, 3401, 3405, 3429



214 (internal door to the checkout machines)


If you need access please e-mail This email address is being protected from spambots. You need JavaScript enabled to view it. with your SoC username, the 16 digit number under your name on your uCard, and please be sure to include the room number(s) to which you want access.

All other doors are managed by other entities and you'll have to contact them for access.  This includes the doors to the buildings themselves and the labs in EMCB.

Written by Scott Ostrander   
Friday, 21 January 2011 13:52

Frequently Asked Questions About Passwords

  • How do I change my password(s)?
To update your NIS/LDAP password, log onto, and run:
This will change your password across all the *nix machines in the department.  Note that some systems run caching daemons and it may take upwards of 10 minutes for the old password to expire from the cache.
To change your Active Directory password log onto and run:
smbpasswd -r
We regularly run our password database against various password crackers.  If your password is vulnerable, your account will be locked without warning. 
  • How do I pick a secure password?
A good strategy it to pick a phrase that you can remember and then use the first letter of each word in the phrase.  Modify it with uppercase, numbers, and symbols. e.g.
all good dogs go to heaven
Could become: 
Make sure your password (for NIS) is 8 chars in length.  Anything longer gets truncated. Do not pick a proper noun or a word from any language! Even permutations of words will most likely be caught by the password cracker.
You may also test your password at the PasswordMeter orYetAnotherPasswordMeter. These are just two of many.  Google for others.
  • How do I to test my own password to see if it is crackable?
John the Ripper is Open Source software.  You can run it against this word list: /uusoc/facility/contrib/tag/john/8chr.lst.  You may get your passwd via the getent command on
  • What if I've forgotten or need to reset my password?
There is a web front end with options for NIS/*nix (shell.cs, Linux systems, email, web, etc.) and Active Directory (Windows, VPN) that let you sync your local passwords to your uNID's password.

Do not email support to ask for your current password.  It is encrypted and we cannot decipher it for you.  Never respond to an email that asks for your password.  It is a phishing scam.  We'll never ask for your password.