> For the complete documentation index, see [llms.txt](https://help.screena.ai/resources/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.screena.ai/resources/how-to/install-screena-portal/launching-screena-portal-backend.md).

# Launching Screena Portal backend

{% hint style="info" %}
Please follow the steps to install Screena Portal in this order:

1. [Preparing your system](/resources/how-to/install-screena-portal/preparing-your-system.md)
2. [Installing Screena Portal backend](/resources/how-to/install-screena-portal/installing-screena-portal-backend.md)
3. [**Launching Screena Portal backend**](/resources/how-to/install-screena-portal/launching-screena-portal-backend.md) **(you are here)**
4. [Installing the web server](/resources/how-to/install-screena-portal/installing-the-web-server.md)
5. [Configuring Screena Portal](/resources/how-to/install-screena-portal/configuring-screena-portal.md)
   {% endhint %}

Open a terminal or command prompt and navigate to the `<Screena portal home>` directory. Run the following command:

{% code overflow="wrap" %}

```shell
nohup java -Xms2048m -Xmx4096m -Dproperties.path=<Screena portal home> -Dfile.encoding=UTF-8 -Djasypt.encryptor.password=screena -jar screena-portal-1.0-spring-boot.jar & < /dev/null
```

{% endcode %}

{% hint style="info" %}

* At first launch, all the database collections with their associated indexes will be created, including the default admin user.
* The apigw\.pid file will contain the process number.
  {% endhint %}