add process collection to steps in NPM install (DataDog#6062)

* add process collection to steps in NPM install * Update content/en/network_performance_monitoring/installation.md Co-Authored-By: ruthnaebeck <19349244+ruthnaebeck@users.noreply.github.com> * Update content/en/network_performance_monitoring/installation.md Co-Authored-By: ruthnaebeck <19349244+ruthnaebeck@users.noreply.github.com> * Update content/en/network_performance_monitoring/installation.md Co-Authored-By: ruthnaebeck <19349244+ruthnaebeck@users.noreply.github.com>

Author: gml3ff

content/en/network_performance_monitoring/installation.md

@@ -45,22 +45,24 @@ To enable network performance monitoring, configure it in your [Agent's main con
 
 To enable network performance monitoring with the Datadog Agent, use the following configurations:
 
-1. Copy the system-probe example configuration:
+1. If you haven't already, enable [live process collection][1] first. 
+
+2. Copy the system-probe example configuration:
  ```
  sudo -u dd-agent cp /etc/datadog-agent/system-probe.yaml.example /etc/datadog-agent/system-probe.yaml
  ```
 
-2. Modify the system-probe configuration file to set the enable flag to `true`.<br>
+3. Modify the system-probe configuration file to set the enable flag to `true`.<br>
 
-3. Optionally uncomment the `system_probe_config` parameter to add a custom object:
+4. Optionally uncomment the `system_probe_config` parameter to add a custom object:
  ```
  ## @param system_probe_config - custom object - optional
  ## (...)
  #
  system_probe_config:
  ```
 
-4. Enter specific configurations for your System Probe data collection:
+5. Enter specific configurations for your System Probe data collection:
  ```
  system_probe_config:
  ## @param enabled - boolean - optional - default: false
@@ -69,10 +71,11 @@ To enable network performance monitoring with the Datadog Agent, use the followi
  enabled: true
  ```
 
-5. Start the system-probe: `sudo service datadog-agent-sysprobe start`
-6. [Restart the Agent][1]: `sudo service datadog-agent restart`
+6. Start the system-probe: `sudo service datadog-agent-sysprobe start`
+7. [Restart the Agent][2]: `sudo service datadog-agent restart`
 
-[1]: https://docs.datadoghq.com/agent/guide/agent-commands/?tab=agentv6#restart-the-agent
+[1]: https://docs.datadoghq.com/graphing/infrastructure/process/?tab=linuxwindows#installation
+[2]: https://docs.datadoghq.com/agent/guide/agent-commands/?tab=agentv6#restart-the-agent
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