cannot find salome.sh or salome.csh

Actually I am trying to export some geometry in order to use it for doing some analysis with software LMGC90.

I have the impression that , suddenly, I cannot read some modules of salome

for example I am getting error messages for import salome (no file exist) etc

could someone pls help me

do I have to reinstall the salome software

I have the impression that I did not have these problems the first day I install it

also I cannot find the file salome.sh or salome.csh

which maybe would solve the problem

I am running the version salome 6.5 in ubuntu 12.04

thanks in advance