# Configuring custom start commands with a Procfileon Elastic Beanstalk

You can include a file that's called `Procfile` at the root of your source bundle to specify the command that starts your application.
**Example Procfile** 
```
web: node index.js
```
For information about `Procfile` usage see [Buildfile and Procfile](platforms-linux-extend.build-proc.md).
**Note** 
This feature replaces the legacy `NodeCommand` option in the `aws:elasticbeanstalk:container:nodejs` namespace.</div><div class="naked_ctrl">
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