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What our Users Have to Say ...
Announcements Physics Computing
Questions and Answers from the Computing Helpdesk
Collected by the IT/User Support Team
Nicole Crémel (Editor) , IT/User Support
This is a collection of Questions & Answers that have been treated by the Computing Helpdesk managed by the User Support group.
N.B. The number in parentheses refers to
its relative numbering in the User Support "Question-Answer"
database, at URL:
PC support -(Hannes Schwarzbauer IT/User Support)
I am registered as a Windows NT administrator. What is the procedure to be followed to reset a profile (when it is corrupted)?
Answer - The procedure is the following:
Start - System Management - NICE NT Domain Administration
The tool only deletes the server copy of the profile and administrators still need to delete manually the local copy. The recommended way to delete the local copy is to log in as a local administrator and use the utility in
Control Panel - System - User Profilesselect the user account, and press the delete button. This will delete all the registry entries associated to the profiles.
N.B. Deleting the files in
How can I
Answer - The standard way is to use:
Start - More applications - Communications - ftp
and choose the host you want. You may also use Exceed in order to ftp to a public unix service. This method is described in:
I cannot access certain files/folders on NICE that I could previously. How can this be corrected?
Answer - Try using the 'recover unaccessible files' option in:
Start - more Applications - system configuration - recover unaccessible filesNote that this is only possible under Windows 95.
How can I lock my X session when using Exceed from NICE?
Answer - First you should note that locking your X session will only lock the UNIX (e.g. PLUS service) part, but your PC will not be locked (look at the end for more details).
Having said that, the first thing to do is to make sure you have
enabled on NICE
Start / More Appl. / Exceed X Terminal v6... / Toolsand then select the tools
You may then lock the screen on the UNIX side (i.e. any PLUS or
WGS service) from the usual menu entry (
As said at the beginning this will only lock the UNIX side. In order to lock the PC screen completely, one must either:
How do I get an account for Windows 2000 and get my machine registered to use the new system?
Answer - For the account and registration for a machine please see URL:
For more in depth information on the Win2000 project at CERN,
What is going on concerning the migration of Netware to Windows 2000 on the CERN servers?
Answer - The current situation is explained at the following URL which also gives detailed explanations, a few hints for users and a schedule of what will go on in the future:
UNIX Support -(Nicole Crémel and Roger Woolnough IT/User Support)
Is there some documentation about how to install a LINUX server with a CERN standard configuration ?
Answer - All should be explained in the "Linux at CERN" Web page, at URL:
I have problems (errors) when linking an application on ATLAS
Answer - First thing to check is that some environment variables used by the loader (command
I am experiencing an unusually long queueing time for submitted
batch jobs. Normally they begin to execute within minutes, instead
of remaining pending with messages like
Answer - This can be an operational problem (especially if many users report it) and the best approach is to alert Serco (via the Helpdesk). To know more about it (and check if this is really an operational problem):
*** Cache partition is FULL - Decrease cachesize!!! ***
Answer - We have an old diagnostic from Transarc on this namely:
"The problem is occurring because we copy the entire file into the local cache when one person on a machine has the file open and someone else on that same machine is deleting it. When you see this error message, you can confirm this by doing a "ls -la" in the directory where the file was deleted and look at the size of the .___afsXXXX files."It looks as it is a known "feature". When the application using the file stopped the problem should go away.
How to check if there is an AFS or network problem ? I am getting
Answer - In order to help the AFS team (
Is there a possibility with LSF to look into files which are opened
during the run (like it was possible with
Answer - Yes, using the command
In a machine such as the
Answer - To ensure a correct separation of files for appropriate architectures, the AFS directories use links to architecture specific
[lxplus001] ~ % cd bin [lxplus001] ~/bin % /bin/pwd /afs/cern.ch/user/t/tjs/.@sys/binAs you see, there is an
What is IT policy regarding Linux ?
Answer - The Linux for the 2000s (L2K) Programme team wrote a "CERN/IT Linux Activities Survey". This document should list all the activities around Linux in the CERN IT division (as well as official statements from the IT management).
You can find this document on the Web at URL:
I cannot run the
Answer - To fully use the
Note: this has to be installed as
If I execute
Answer - This is because there are NO Oracle tools available on Linux yet. The problem will disappear if Oracle was to deliver a software long overdue.
To use the "real" tools, you must run
A request was made to remove the command from the ASIS product list on LINUX, until it works, and to avoid confusion.
I cannot kill some batch jobs with the command
Answer - Please note that if you cannot kill your own jobs with
In any cases, the Helpdesk cannot kill the job for any user: the only think they can do is to pass the message (with as precise information as possible, and at least the execution node) to the system administrator, so that they are aware of the problem, and schedule eventually a reboot for this system.
Is there a web page where users are notified of possible interruption of the tape service, and of its estimated duration ?
Answer - You can find some information about the status of tape servers in the TVScreen Web page, at URL:
Can I see who is responsible for the tools / scripts program which
Answer - You can see this with the command
[rsplus08] ~ > ASISInfo --belong /usr/local/bin/cuserinfo ERROR:File /usr/local/bin/cuserinfo in ASIS - No such file or directory [rsplus08] ~ > ls -l /usr/local/bin/cuserinfo -rwsr-xr-x 1 regist c3 10331 Mar 25 1998 /usr/local/bin/cuserinfo [rsplus08] ~ > phone regist -F 23932; Ccdb DATABASE 72995 IT 31 3-008;Ccdb.Database@cern.chwhich means that this is managed by the Ccdb DATABASE service responsible.
[rsplus08] ~ > ASISInfo --belong /usr/local/bin/gs GNU.MISC/ghostscript-5.50which shows that it is a GNU product provided by the ASIS team.
Mail support -(Michel Franceschi and Miguel Marquina IT/User Support)
I cannot open Netscape/mail on my AXCAD station. I try and the window keeps dissapearing. This is irritating, please do something about it!
Answer - We have already seen "misbehaviours" with Netscape on ALPHA machines. All is reduced to reset your own Netscape configuration which is probably corrupted.
cd $HOME mv .netscape .netscape-badand then launch Netscape. If "cured", you would only need to copy back both your bookmarks and your addressbook:
cp .netscape-bad/bookmarks.html .netscape cp .netscape-bad/abook.nab .netscape cp .netscape-bad/address-book.html .netscape
If we are encouraged to always use the Generic E-Mail address
(GEM), why do the unix
Answer - This depends whether the user uses an account on the CERN mail server or not:
Any chance to have the mouse support under
Web Publishing -(Maria Dimou IT/User Support)
I used to attach the
This no more works. Why?
Answer - The machine changed name from
You can find full instructions in:
Where should I put my CGI script, so it can be reached through the web?
Answer - First you have to register your web site, if you don't have one already. To do this you open the form: http://cern.ch/webregister Thus you obtain the site:
If your files are in afs this corresponds to the
Please note: The scripts will only execute one day after the
creation of the
If your CGI needs to read, write or delete a given file in your
afs directory, you should also enable the following permissions in
your afs ACL:
If your files are local to the server
I got problems with EDH web since installing Netscape 4.7. I get
(one of) the following errors; after contacting
1. # Error: Issuer certificate is invalid (-8156) 2. # jarfile: Z\P32\NCOMM47\PROGRAM\java\classes\java40.jar 3. # path: Z\P32\NCOMM47\PROGRAM\java\classes\java40.jarI click on OK and ...
4. Java reported the following error on startup. Java.lang.SecurityException : system classes were not signed."
Answer - This could mean that your certificates file is corrupted. Close all Netscape windows and delete
c:\netscape\users\<your_login_name>\cert7.dbAn empty certificates file will be re-created at the next Netscape start.
About the author(s): Nicole Crémel is working in the User Support group and, with Roger Woolnough, is responsible for the supervision of operations of the Computing Helpdesk. Editing and revising the "Question and Answers" database is a daily task of most members of the group.