Frequently asked questions
1. Why does my session sometimes stop responding?
Cray-Cyber.org is connected through an ADSL Line provided by the german telecom
so it can be that the connection sometimes just breakes down.
This should not happen actually - we're reconnecting at 6 o'clock and 6:30
local time (as we will be automatically disconnected after 24h).
Fortunately we don't have to update our DNS entries anymore as we have a fixed
IP Address now.
As soon as the connection gets lost, our server reconnects.
If your session is disconnected, you can always resume it using the feature
in the main menu.
2. Why are most machines only running on saturday?
Easy - because these machines consumes lots of power.
The cyber consumes about 12 kilowatts, the cray about 3.5 kilowatts.
If you want to have them running longer, feel free to
donate to the cray-cyber project.
If you want your donation only to be used for the power bills, enter something
like "Cray-Cyber Project - Power" into the description field.
3. Will backup of my userdata be made?
Yes, we will make backups but we however can take no responsibility for lost
data - we just do our best to make backups whenever possible.
4. Will you take responsiblity for something?
NO! - the answer is really that simple. We can neither take
responsibility for anything nor can we ensure the operation at the given times.
Although we are always trying our best to make the promised machines available
every saturday, we cannot guarantee the machines to be available because
the machine might fail, all operators may be ill/on vacation or whatever.
We never had this situation till now, and we don't expect it to happen, but
never say never.
5. Why do I sometimes get a "password" prompt when logging in via telnet
Some clients want to be very intelligent and already enter the username
from which you invoked the client into the login: field. This happens on
MacOS X, NetBSD, OpenBSD and Tru64, for example.
Easy solution: You get another login prompt by just pressing enter.
6. I got the CDCNET Prompt - what now?
It's crazy - but this is often asked (some people can't read anymore these
days) - just have a look at the NOS Short Users Guide which is located
7. I can logon to the logon server but not to a SuperComputer via the login menu - I always get 'login incorrect'
All our UNIX-Based supercomputers get its password-databases from the Server
every 20 minutes. So if you just changed your password, the Cray will most
likely not have your current one. Wait 20 minutes after changing your password
on the login.cray-cyber.org-Server or try with the password e-mailed to you
(this is valid until the next synchronization-period).
8. I can't get out of the Full Screen Editor or I'm stuck somewhere
else on the Cyber
If you're stuck somewhere out of the FSE, press CTRL-T. CTRL-T normally aborts
your current job.
If you're stuck in the FSE, move your cursor into the upper left corner and
enter EXIT there. This is the command line.
In case CTRL-T does not work, try %2 instead. [percent-sign and digit 2]
9. Is there a way to see those dinosaurs in real life?
Yes, there are several ways. We are located in Munich, Germany. Once a
year -- always the first weekend in May -- there is the Vintage Computer Festival Europa (VCFe)
in Munich. Visitors of the VCFe can attend excursions w/ guided tours
to our Vintage Computer Center. Usually on a Saturday around end of
November each year, our annual Tours Day takes place with guided tours
through the Vintage Computer Center as well. Visit our website from
time to time for the announcements. There is also an announcement
mailing list where you can subscribe.
If both dates are inconvenient to you: Each Saturday from 12:00h to
18:00h there is at least one of us in the Computer Center doing some
maintenance work. There usually is no problem with you just passing
by. It would help, if you drop a short note beforehand to firstname.lastname@example.org. Under certain
circumstances there could be some lack of time, so your visit better
is rescheduled to another day. There is also a way to arrange guided
tours -- also for groups -- during the week, whenever you
want. Contact us at email@example.com for scheduling.
There is no entrance fee, but if you feel worth it, you can donate. At
VCFe excursion there will be charged for the transfer only.