Difference between revisions of "NEMO/Login"
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= Login = |
= Login = |
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| − | After registration (registration procedure at [[bwForCluster User Access]], the bwForCluster NEMO can be accessed via |
+ | After registration (registration procedure at [[bwForCluster User Access]], the bwForCluster NEMO can be accessed via a Secure Shell like <tt>ssh</tt> on Linux and Mac or <tt>PuTTY</tt> on Windows systems. |
From linux machines, you can log in using |
From linux machines, you can log in using |
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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. |
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. |
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= Further reading = |
= Further reading = |
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Revision as of 20:43, 13 July 2016
Contents
1 Login
After registration (registration procedure at bwForCluster User Access, the bwForCluster NEMO can be accessed via a Secure Shell like ssh on Linux and Mac or PuTTY on Windows systems.
From linux machines, you can log in using
ssh <UserID>@login.nemo.uni-freiburg.de
To run graphical applications, you can use the -X or -Y flag to openssh:
ssh -Y <UserID>@login.nemo.uni-freiburg.de
For better performance on slow connections you should use e.g. VNC.
1.1 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 |
1.2 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.
2 Further reading
- Scientific software is made accessible using the Environment Modules system
- Compute jobs must be submitted as Batch Jobs
