NEMO/Login
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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. |
The login nodes of the bwHPC clusters are the access point to the compute system, your $HOME directory and your workspaces.
All users must log in through these nodes to submit jobs to the cluster.
Prerequisites for successful login:
You need to have
- completed the 3-step registration procedure.
- set a service password for NEMO.
Login to bwForCluster NEMO
Login to bwForCluster NEMO is only possible with a Secure Shell (SSH) client for which you must know your username on the cluster and the hostname of the login nodes. For more general information on SSH clients, visit the SSH clients Guide.
Username
If you want to use the NEMO cluster you need to add a prefix to your local username. For prefixes please refer to the Username Wiki.
Example:
- If your local username for the University is
vwxyz1234and you are a user from the University of Freiburg this would combine to:fr_vwxyz1234.
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 |
Login with SSH command (Linux, Mac, Windows)
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. More recent versions of Windows 10 and Windows 11 using the Windows Subsystem for Linux (WSL) also come with a built-in OpenSSH client.
For login use one of the following ssh commands:
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 with graphical SSH client (Windows)
For Windows we suggest using MobaXterm for login and file transfer.
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 : <username> 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. If you do not have a service password yet or have forgotten it, please create one (see Registration/Password). - 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
ooooo ooo oooooooooooo ooo ooooo .oooooo.
`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.
Related Information
- If you want to reset your service password, consult the Password Guide.
- If you want to de-register, consult the De-registration Guide.