NEMO/Login
Login to NEMO
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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 completing the web registration, the NEMO cluster is ready for your SSH based login.
NEMO Username
If you want to use the NEMO cluster you need to add a prefix to your local username. The prefixes are described in the username Wiki page.
Example:
If your local username for the University is vwxyz1234 and you are a user from the University of Freiburg this would combine to:
fr_vwxyz1234
NEMO Hostnames
The system has two login nodes. You have to select the login node yourself.
| Hostname | Node type |
|---|---|
| login.nemo.uni-freiburg.de | NEMO first login node alias |
| login1.nemo.uni-freiburg.de | NEMO first login node |
| login2.nemo.uni-freiburg.de | NEMO second login node |
SSH clients
For a more detailed information on SSH clients, visit the SSH clients Wiki page.
Login form Linux or Mac
Most Unix and Unix-like operating systems like Linux, Mac OS and *BSD come with a built-in SSH client provided by the OpenSSH project.
ssh <username>@login.nemo.uni-freiburg.de ssh -l <username> login.nemo.uni-freiburg.de
To run graphical applications, you can use the -X or -Y flag to ssh:
ssh -Y -l <username> login.nemo.uni-freiburg.de
For better performance, we recommend using VNC.
Login from Windows
For windows we suggest using MobaXterm for login and file transfer. More recent versions of Windows 10 and Windows 11 using the Windows Subsystem for Linux (WSL) also come with a built-in OpenSSH client. After installing a linux system with WSL use the instructions for linux.
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.
Login Example
To log in to NEMO, you must provide your service password. Proceed as follows:
- Use SSH for a login node.
- The system will ask you for your service password
password:. Please enter it and confirm it with Enter/Return. - You will be greeted by the cluster, followed by a shell.
~ $ ssh fr_vwxyz1234@login.nemo.uni-freiburg.de
fr_vwxyz1234@login.nemo.uni-freiburg.de's password:
Last login: Thu Sep 8 16:01:18 2022 from host1.nemo.uni-freiburg.de
Research Cluster Baden Wuerttemberg
bwForCluster
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`888b. `8' `888' `8 `88. .888' d8P' `Y8b
8 `88b. 8 888 888b d'888 888 888
8 `88b. 8 888oooo8 8 Y88. .P 888 888 888
8 `88b.8 888 " 8 `888' 888 888 888
8 `888 888 o 8 Y 888 `88b d88'
o8o `8 o888ooooood8 o8o o888o `Y8bood8P'
Neuroscience Elementary Microsystems Materials
Particle Engineering Science
Physics
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Node : login1.nemo.uni-freiburg.de
OS : CentOS 7.9 (Rev. 23), 3.10.0-1160.76.1
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NEMO Info : http://www.nemo.uni-freiburg.de
NEMO Status : http://www.nemo.uni-freiburg.de/nemo/stat/
NEMO Support : http://www.nemo.uni-freiburg.de/support/
NEMO News : http://www.nemo.uni-freiburg.de/news/
Central Wiki : http://wiki.bwhpc.de
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Status : NEMO: normal operation
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Published : 2022-09-03 by HPC Team Freiburg
Security update September applied (CentOS 7.9, Rev. 23).
See update log for timestamps
/opt/bwhpc/os-revisions/security_update_2022-09.
See http://www.nemo.uni-freiburg.de for more information on NEMO.
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fr_vwxyz1234@login1 ~]$
Allowed Activities on Login Nodes
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To guarantee usability for all the users of clusters you must not run your compute jobs on the login nodes. Compute jobs must be submitted to the queuing system. Any compute job running on the login nodes will be terminated without any notice. Any long-running compilation or any long-running pre- or post-processing of batch jobs must also be submitted to the queuing system. |
The login nodes of the bwHPC clusters are the access point to the compute system, your $HOME directory and your Workspaces.
These nodes are shared with all the users therefore, your activities on the login nodes are limited to primarily set up your batch jobs.
Your activities may also be:
- short compilation of your program code and
- short pre- and post-processing of your batch jobs.
We advise users to use interactive jobs for compute and memory intensive tasks like compiling.
Password Reset
See Password Guide.
De-registration
Further reading
- bwForCluster NEMO main wiki
- Scientific software is made accessible using the Software Modules system
- Compute jobs must be submitted as Batch Jobs