Access to the computer ressources of LEGI

computer account

All members of LEGI, including visitors, receive a computer login and password, common to all the computers belonging to the network at LEGI. This gives access to the ​intranet of LEGI (in French), which contains a ​wiki about computer ressource. Useful sections:

• ​Access to webmail
• ​Access to bibliography
• ​Acess to the computing ressources

To enable connection of your own laptop to the network, please contact the computer support service of LEGI.

To reach the computer server 'servcalcul3' from a Linux machine at LEGI, use the command 'ssh -CX servcalcul3' (the option '-CX' provides a graphic terminal).

For remote access with graphic interface, you can use the terminal system NXclient, available for all the classical operating systems (Linux, Widows, MacOS). This can be used also for remote access from outside using any decent internet connexion.

Terminal NX client

NXclient can be directly downloaded from ​http://www.nomachine.com/download.php.

To configure the connection:

• host: servcalcul3.legi.grenoble-inp.fr
• key: you need to upload a key ('certificat') text file
• 'Enable SSL for all traffic' (default), do not 'connect through http proxy'
• different user interfaces can be chosen. The interface 'KDE' is fairly similar to Windows system.
• graphical options: for a fast response select
  • disable DirectDraw
  • disable deferred screen update
  • disable ZLIB stream compression
• keyboard: pour un clavier francais, utiliser le menu 'Advanced/Keyboard/French?(Alternative)' ET si vous avez toujours des problemes sous KDE :
  • tapez la commande setxkbmap fr
  • dans le menu "Control Center" puis "Regional & Accessibility" puis Keyboard Layout choisissez Model 105 Keys et layout France, vous devriez avoir un petit drapeau dans la barre de menu en bas a droite pour selectionner votre clavier francais.

Acces to data

Data transfer from/to outside cannot be done by NXclient (except as attached files using webmail). For that you need scp procedure, using par example ​filezilla. Configuration of filezilla:

• host: servcalcul3.legi.grenoble-inp.fr
• type of server : SFTP
• account : normal
• user name, etc

Data organisation

• Connection to servcalcul3 brings you to your home directory named /home/users/'login name'.
• Larger data sets can be stored in /fsnet/data/legi/calcul9/data/'login name'.
• Large data sets for specific projects are stored in /fsnet/project/. For the Coriolis facility, data are stored in /fsnet/project/coriolis with sub-folders indicating the year of project completion.

More information is provided in ​HowTo/Data and ​HowTo/Backup.

Matlab

Open matlab by typing 'matlab' from a terminal, or 'matlab &' to keep the terminal active for new commands. Choose as 'Current Folder' the folder which contains your processing functions (an alternative option is to declare paths to your functions, but the set of paths cannot be saved for next opening of matlab).

To get faster response, it is advised to work on a cluster node instead of servcalcul3. This is done by typing 'oarsub -I' on a terminal prior to opening matlab. More advanced computing distribution on the cluster can be done with the ​oar system.