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General
(Miguel Marquina and the UCO team, IT/DCI)
The command `acrontab -e' gives me the following error:
cernsp> /afs/usr/local/etc/arc: cannot authenticate to server afs5: No ticket file (tf_util) Unknown user: 'unknown', no valid Kerberos ticket?but it seems that I have a valid afs token:
cernsp > tokens Tokens held by the Cache Manager: User's (AFS ID 14524) tokens for afs@cern.ch [Expires Feb 12 12:05]What can I do?
You do not have a valid Kerberos ticket. Either you logged in
using `rlogin' or `rsh' (which forwards AFS tokens
but not Kerberos tickets), or you dropped your
Kerberos ticket (e.g. by removing the ticket file or
changing the relevant environment variable), or you renewed
the AFS token but let the Kerberos ticket expire.
To solve this problem use the command `tokens.krb'
to find out about your tickets, and `klog.krb'
to request a fresh set.
I have sent a `uuencode' file to a colleague with "pine", and he says it does not work. I have still my own file, I try to `uudecode' it and it looks good. Do you understand what is wrong?
"uuencode" files sometimes have trailing blanks. If you send these files
as ordinary mails (inside the mail body), the mail agent will assume
those blanks are irrelevant, so any extraction operation will remove them.
The only way to ensure that the original file is respected is by using
the `Attachment' option of your mail agent.
N.B. The same goes for PS files. Those files are often wider than 80 characters
and mail agents like pine wrap long lines. Again,
formats must be respected
and this is only achievable by "attaching" them.
I would like to run a cgi-script for one of my private Web page, is it possible?
cgi-scripts are programs running by definition inside the
http server. Private cgi-scripts are a dangerous
security hole and are therefore not permitted.
In case you need to run cgi-scripts for your work,
contact your
Divisional
or Group Webmaster who will
install and (hopefully) test it.
Is it possible to interactively "talk" with another user if we are not working on the same computer node/platform?
Yes, with Zephyr (type `man zephyr'), the "Message Service for UNIX Users". It is a notice transport and delivery system that allows UNIX users to send messages to each other (unlike the command `write' users do not need to be on the same node).
X Window
(Miguel Marquina and the UCO team, IT/DCI)
Is it possible to run on a CERN X terminal (or workstation) an application at SLAC (or anywhere else) that throws back an X window?
CERN has a security protection mechanism to prevent this. However,
if your are using
a "CERN standard" desktop (X-terminal or workstation) then you can run
The other alternative is to re-number the X terminal (or workstation)
to have permament outside visibility. Please contact
N.B. Please note that the above is only related to X security issues.
Let us remind you that for computer security issues in general the
main "entry points" are:
mxconns either on the desktop (if its a UNIX workstation),
or on the session manager (if its an NCD X terminal).
N.B. mxconns, a tool supported by the workstation support section
of IT/DCI, "bypasses" the X security blockage. In case of problems
please contact Computer.Security@cern.ch.
Network.Support@cern.ch
to get this operation performed.
Computer.Security@cern.ch,
http://wwwinfo.cern.ch/dci/security/.
Vice-versa is it possible to run and application on CERNSP and get the display output on a DESY (for instance) X terminal (or workstation)?
There is no problem accessing CERNSP from outside: any machine
from anywhere in the world can do a
If this does not work (try with telnet to CERNSP.
For instance, if you have an (NCD) X terminal at DESY then you just
need to know its name (say `xndesy1'). If you then do
a telnet from this terminal to CERNSP and want to
run an application based on X Window (e.g. paw, or even a
simple xterm) you need to set the DISPLAY
environment variable and set the "Access Control" on your local host
as explained in the
"Guide for the Usage of X Window at CERN".
(N.B. on CERNSP you may use the command `host' to find the node
you are on).
xterm) it means that things
are blocked on your site (e.g. DESY or SLAC), maybe for the same security
reasons as at CERN. Then you will have to contact your local "User Support"
team (e.g. at DESY or SLAC).
Text Processing (Michel Goossens, IT/ASD)
I want to include a PS file (or PS converted to another format) directly in HTML (i.e. I do not want the PS file to be shown by ghostview). How can I convert the PS file to a convenient format and which "simple-to-use" tools exist to do the conversion?
You are limited by what the Web browsers include at present inline, and that is GIF (some do PNM also). PostScript is a complex language, so it is non-trivial to embed those images inline in the page (GIF is a bitmapped representation optimized for the 100dpi resolution of the screen). There is a utility called "pstogif" (which calls gs internally, I think) which can translate a PS file into a GIF image from the command line, but I do not know whether this command cropped the PS image to their correct size. Such a utility is used inside "latex2html" for generating GIF pictures for the math, tables, figures, etc. (and hence the included EPS files) to be used inside an HTML browser.
NICE 95 (Jason Oh IT/DCI)
http://wwwinfo.cern.ch/uco/FAQs#nice95
I am using the PC X server Exceed; is it possible to view my PC applications whilst Exceed is still running?
The answer is "Yes".
Exceed, a commercial PC X Server product, has
been designed for that: it permits simultaneous execution and
interaction of X clients, and DOS, Microsoft Windows, Windows NT and
Windows 95 applications across the network or over
standard telephone lines. Local Windows and host-based X applications
run concurrently on the PC screen, with capability to copy and paste
from one window to another, transferring data
and images among usually incompatible computing environments.
Here is the recipe for switching to your PC environment:
from the Exceed console click on the icon containing 3 cubes.
This will launch the configuration menu: select `Window Mode'
and check the option panning; now moving to the left or right of the desktop
will allow access to PC Windows applications. Another solution would be to
minimise the Exceed desktop by clicking on the _ on the
top right hand corner of the desktop.
Please note that Exceed is newly available on NICE
and is currently there only for evaluation purposes due to the instability of
NCD X-ware 5. There is, for the moment,
only a limited support for this package.
I am using a PC. How can I copy information from my Exceed session to my NICE 95/NT applications.
This is achieved by selecting the text with the mouse
and clicking on the icon X [ab]; the selected text can
then be pasted into a Windows application. There are also other
clipboard icons which allow for copying of entire windows or areas.
I have recently received a new Novell account but on NICE95 I don't get the usual desktop icons. For example "phone", "mail" and a shortcut to my home directory. Is there anything wrong?
No, this behaviour is normal; the icons on the desktop are created only
after the account data comes back from Oracle. This may take one
or two days after the account is created.
From Windows 95 (NICE95) how can I easily transfer (ftp) files to my afs account?
The most convenient method is to use Netscape Gold and use
the URL ftp://Login_name@cernsp/"afspath",
e.g. if your login name
on CERNSP is jowett:
I have a PC laptop on which I wish to install NICE95/NT. Where can I find help?
If the laptop was bought from the PC shop at CERN,
it can be installed by their technicians.
Otherwise, it is considered "non standard" and the onus is
on the end-user or his
divisional support
representatives, who may perform the installation.