1. Install the fibers node package on the server.

npm -g install fibers

 

2. Define the server methods in server.js.
server/server.js

Meteor.startup(function () {
  // Load future from fibers
  var Future = Npm.require("fibers/future");
  // Load exec
  var exec = Npm.require("child_process").exec;

  // Server methods
  Meteor.methods({
    runCode: function () {
      // This method call won't return immediately, it will wait for the
      // asynchronous code to finish, so we call unblock to allow this client
      // to queue other method calls (see Meteor docs)
      this.unblock();
      var future=new Future();
      var command="pwd";
      exec(command,function(error,stdout,stderr){
        if(error){
          console.log(error);
          throw new Meteor.Error(500,command+" failed");
        }
        future.return(stdout.toString());
      });
      return future.wait();
    }
  });
});

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