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= Login = |
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Access to NEMO is '''limited to IP addresses from the BelWü network'''. |
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All home institutions of our current users are connected to BelWü, so if you are on your campus network (e.g. in your office or on the campus WiFi) you should be able to connect to NEMO without restrictions. |
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If you are outside one of the BelWü networks (e.g. at home), a VPN connection to the home institution or a connection to an SSH jump host at the home institution must be established first. |
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From linux machines, you can log in using |
From linux machines, you can log in using |
Revision as of 13:54, 10 February 2022
Login
Access to NEMO is limited to IP addresses from the BelWü network. All home institutions of our current users are connected to BelWü, so if you are on your campus network (e.g. in your office or on the campus WiFi) you should be able to connect to NEMO without restrictions. If you are outside one of the BelWü networks (e.g. at home), a VPN connection to the home institution or a connection to an SSH jump host at the home institution must be established first. |
After registration (registration procedure at Registration/bwForCluster), the bwForCluster NEMO can be accessed via a Secure Shell like ssh on Linux and Mac.
From linux machines, you can log in using
ssh <UserID>@login1.nemo.uni-freiburg.de ssh <UserID>@login2.nemo.uni-freiburg.de
To run graphical applications, you can use the -X or -Y flag to openssh:
ssh -Y -l <UserID> login1.nemo.uni-freiburg.de ssh -Y -l <UserID> login2.nemo.uni-freiburg.de
For better performance on slow connections you should use e.g. VNC.
Windows Systems
For Windows systems we strongly recommend to use MobaXterm instead of PuTTY or WinSCP on Windows. MobaXterm provides a built-in X11 server allowing to start GUI based software.
Start MobaXterm, fill in the following fields:
Remote name : login.nemo.uni-freiburg.de # or login1.nemo.uni-freiburg.de, login2.nemo.uni-freiburg.de Specify user name : <UserID> Port : 22
After that click on 'ok'. Then a terminal will be opened and there you can enter your credentials.
About UserID / Username
<UserID> of the ssh command is a placeholder for your username at your home organization and a prefix denoting your organization. Prefixes and resulting user names are as follows:
Site | Prefix | Username |
---|---|---|
Freiburg | fr | fr_username |
Heidelberg | hd | hd_username |
Hohenheim | ho | ho_username |
Karlsruhe | ka | ka_username |
Konstanz | kn | kn_username |
Mannheim | ma | ma_username |
Stuttgart | st | st_username |
Tübingen | tu | tu_username |
Ulm | ul | ul_username |
Example
So if your local username for the University is vwxyz1234
and you are a user from the University of Freiburg this would combine to:
ssh -l fr_vwxyz1234 login.nemo.uni-freiburg.de
Allowed activities on login nodes
The login nodes are the access point to the compute system and its $HOME directory. The login nodes are shared with all the users of the cluster. Therefore, your activities on the login nodes are limited to primarily set up your batch jobs. Your activities may also be:
- compilation of your program code and
- short pre- and postprocessing of your batch jobs.
To guarantee usability for all the users of the bwForCluster you must not run your compute jobs on the login nodes. Compute jobs must be submitted as Batch Jobs. Any compute job running on the login nodes will be terminated without any notice. We advise users to use interactive jobs for compute and memory intensive tasks like compiling.
Password Reset
If you forgot your password for the bwForCluster NEMO you can set a new one on the NEMO service page. Just use the link in the bwForCluster NEMO service box.
If you have trouble resetting your password, please try to delete your password first (use button) and then reset it again. If this does not help de-register and re-register the NEMO service. Otherwise please contact the bwForCluster NEMO Support.
Further reading
- Scientific software is made accessible using the Environment Modules system
- Compute jobs must be submitted as Batch Jobs