Hello everybody.   
      
           I am trying to install MBSE into an Ubuntu system.   
      
           I have installed all the packages recommended at README.Ubuntu, then I   
   tried to execute the Setup script.   
      
           I am getting the following error message:   
      
           "Adding group 'bbs', user 'mbse' Linux useradd: group 'admin' does not   
   exist"   
      
           What should I do now?   
      
   Flavio   
      
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