Thank you for your help.
The modules.list wasn't set correctly.
So now l4linux is running.
Which modules I need to add to modules.list file to use xterm on l4linux?
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Maxime LASTERA
Phd Student
Dependable Computing and Fault Tolerance group
LAAS-CNRS
7 av Colonel Roche
31077 Toulouse
E-mail: mlastera(a)laas.fr
Phone : +33561336979
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