text: var child_process = require("child_process");
  
  
  function exec(cmd,callback) {
  
      console.log("Executing " ,cmd);
      var the_code = 61;
      var child = child_process.exec(cmd,function(err) {
      });
  
      child.stdout.pipe(process.stdout);
  
      child.on('close', function(code) {
          the_code = code;
          console.log("done ... (" + the_code + ")");
          callback();
      });
  }
  
  exec("node bin/generate_opcua_classes.js --clear ",function() {
      exec( "node bin/crypto_create_CA.js demo --silent",function() {
      });
  });
  