我运行了这个命令：php app/console
Symfony version 2.0.0-RC1 - app/dev/debug
Usage:
[options] command [arguments]
Options:
--help -h Display this help message.
--quiet -q Do not output any message.
--verbose -v Increase verbosity of messages.
--version -V Display this program version.
--ansi Force ANSI output.
--no-ansi Disable ANSI output.
--no-interaction -n Do not ask any interactive question.
--shell -s Launch the shell.
--env -e The Environment name.
--no-debug Switches off debug mode.
Available commands:
help Displays help for a command
list Lists commands
assetic
assetic:dump Dumps all assets to the filesystem
assets
assets:install
cache
cache:clear Clear the cache
cache:warmup Warms up an empty cache
container
container:debug Displays current services for an application
doctrine
doctrine:cache:clear-metadata Clear all metadata cache for a entity manager
doctrine:cache:clear-query Clear all query cache for a entity manager
doctrine:cache:clear-result Clear result cache for a entity manager
doctrine:database:create Create the configured databases
doctrine:database:drop Drop the configured databases
doctrine:ensure-production-settings Verify that Doctrine is properly configured for a production environment.
doctrine:generate:crud Generates a CRUD based on a Doctrine entity
doctrine:generate:entities Generate entity classes and method stubs from your mapping information
doctrine:generate:entity Generates a new Doctrine entity inside a bundle
doctrine:generate:form Generates a form type class based on a Doctrine entity
doctrine:mapping:convert Convert mapping information between supported formats.
doctrine:mapping:import Import mapping information from an existing database
doctrine:mapping:info Show basic information about all mapped entities
doctrine:query:dql Executes arbitrary DQL directly from the command line.
doctrine:query:sql Executes arbitrary SQL directly from the command line.
doctrine:schema:create Executes (or dumps) the SQL needed to generate the database schema.
doctrine:schema:drop Executes (or dumps) the SQL needed to drop the current database schema.
doctrine:schema:update Executes (or dumps) the SQL needed to update the database schema to match the current mapping metadata.
generate
generate:bundle Generates a bundle
generate:doctrine:crud Generates a CRUD based on a Doctrine entity
generate:doctrine:entities Generate entity classes and method stubs from your mapping information
generate:doctrine:entity Generates a new Doctrine entity inside a bundle
generate:doctrine:form Generates a form type class based on a Doctrine entity
init
init:acl
router
router:debug Displays current routes for an application
router:dump-apache Dumps all routes as Apache rewrite rules
swiftmailer
swiftmailer:spool:send Send emails from the spool
我将遵循官方Symfony文档（http://symfony.com/doc/current/book/page_creation.html）进行翻译，您无法运行命令：
php app/console init:bundle Acme/HelloBundle src
[InvalidArgumentException]
Command "init:bundle" is not defined.
如何创建我的第一个“Bundle”？