# Defining the runbook process for targets

A runbook process can run steps, which include scripts, on the Octopus Server, a worker, or a deployment target.  Up until this point in the tutorial the runbook process for  *Hello Runbook* only ran on the Octopus Server.  With the deployment target(s) added on the previous page, we can now update the runbook process to run on deployment targets.

1. Click **Runbooks** on the left menu.
1. Click *Hello Runbook* in the list of runbooks.
1. Click **Process** in the runbook menu.
1. Click **ADD STEP**.
1. Select the **Script** tile to filter the types of steps.
1. Scroll down and click **ADD** on the **Run a Script** tile.
1. Change **Name** of the script to be "Run a script on deployment targets" for the script 
1. Leave the **Enabled** check-box ticked.
1. In the **Execution Location** section change the option to be **Run on each deployment target**.
1. In the **Target Tags** section change the tag to be `Hello-World`.

:::figure
![Changing the script step to run on a deployment target](/docs/img/getting-started/first-runbook-run/images/run-script-on-deployment-target.png)
:::

:::div{.hint}
Not all steps can run on deployment targets.  A step missing the option **Target Tags** indicates that step must run on the Octopus Server or a [on a worker](/docs/infrastructure/workers)
:::

11. Scroll down to the **Script**, select your script language of choice and enter the following script in the **Inline Source Code** section:

<details data-group="getting-started-first-runbook-run-define-the-runbook-process-for-targets">
<summary>PowerShell</summary>

```powershell
Write-Host $OctopusParameters["Helloworld.Greeting"]
Write-Host $OctopusParameters["Octopus.Machine.Name"]
```

</details>
<details data-group="getting-started-first-runbook-run-define-the-runbook-process-for-targets">
<summary>Bash</summary>

```bash
greeting=$(get_octopusvariable "Helloworld.Greeting")
echo $greeting
machineName=$(get_octopusvariable "Octopus.Machine.Name")
echo $machineName
```

</details>

1.  Click **SAVE**
2.  Click **RUN...** and select an environment to run on.

:::figure
![Running the runbook script on a deployment target](/docs/img/getting-started/first-runbook-run/images/run-deployment-target-results.png)
:::

:::div{.hint}
Not all scripts should run on a deployment target.  A rule of thumb is a script should target a deployment target if it needs to modify something specific on that target, such as restarting a service, or installing a web server.  If you need to manage PaaS targets, K8s clusters, or database servers, the recommendation is to run the script [on a worker](/docs/infrastructure/workers).
:::

The next step will [publish the runbook](/docs/getting-started/first-runbook-run/publishing-a-runbook) so it can used by triggers and users have a known version to run.

**Further Reading**

For further reading on runbook processes and what is possible please see:

- [Runbook Examples](/docs/runbooks/runbook-examples)
- [Runbook Documentation](/docs/runbooks)