This is a basic console command/task that you can create for your bundles in the Symfony2 framework. Tested with 2.0.4

First, create your console command class file in Symfony/src/<MyNamespace>/<MyBundle>/Command/<CommandName>Command.php

For example, if my namespace is Spliced and my bundle name is AwesomeBundle and the command I want to create is going to be called Awesome, then I would create this file:

Symfony/src/Spliced/AwesomeBundle/Command/AwesomeCommand.php

Now, set up your class to look like this, just replace your namespaces and bundles. I will use the above exampled namespace/bundle:

namespace Spliced\AwesomeBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

class AwesomeCommand extends ContainerAwareCommand
{
	/**
	 * Initialize whatever variables you may need to store beforehand, also load
         * Doctrine from the Container
	 */
    protected function initialize(InputInterface $input, OutputInterface $output)
    {
        parent::initialize($input, $output); //initialize parent class method

        $this->em = $this->getContainer()->get('doctrine')->getEntityManager(); // This loads Doctrine, you can load your own services as well
    }
     /**
    * Configure the task with options and arguments
    */
    protected function configure()
    {
        parent::configure();

        $this
  
        ->setName('spliced:awesome') // this is the command you would pass to console to run the command.
        ->setDescription('An example Awesome Command')    // Your Description

         // Add an Argument
        ->addArgument('argument_name', InputArgument::REQUIRED, 'Argument Description', 'Argument Default Value') 

       // Add an Option
        ->addOption('option', 'o', InputOption::PARAMETER_OPTIONAL, 'Option Description', 'Option Default Value'); // Add an Option

      // Here are some parameter requirement constants:  InputOption::PARAMETER_OPTIONAL, InputOption::PARAMETER_REQUIRED
  
    }
     /**
    * Our console/task logic
    */
    protected function execute(InputInterface $input, OutputInterface $output)
    {

        $options = $input->getOptions(); // load options passted from console

        /* DO YOUR AWESOME STUFF HERE */
        

		 //get Doctrine EntityManager we initialized  in the initialize method and get a Repository to do something useful maybe
		# $this->em->getRepository('SplicedAwesomeBundle:AwesomeSauce')->getAllAwsomeSauce();

        // Display Some Output
       $output->writeln('My Awesome Task Did Some Pretty Awesome Stuff!');
     
    }
}

Now if I were to go to a bash line in the Symfony root directory and use the command:

php app/console spliced:awesome

Then my console command will have been successfully executed. Good for when you need or prefer a command line routine.