---
title: Configure Datadog SDKs with application_monitoring.yaml on Linux
description: >-
  Configure Datadog SDK settings at the host level on Linux using the
  application_monitoring.yaml file. Settings apply to all instrumented services
  on the host.
breadcrumbs: >-
  Docs > APM > Application Instrumentation > Configure the Datadog Tracing
  Library > Configure Datadog SDKs with application_monitoring.yaml on Linux
---

# Configure Datadog SDKs with application_monitoring.yaml on Linux

## Overview{% #overview %}

On Linux hosts, you can configure Datadog SDKs at the host level using the `application_monitoring.yaml` file. The file works for any SDK loaded on the host, including those loaded through Single Step Instrumentation (SSI). All instrumented services on the host inherit these settings.

## Configuration steps{% #configuration-steps %}

1. Ensure the `application_monitoring.yaml` file exists at the following path:

   ```
   /etc/datadog-agent/application_monitoring.yaml
   ```

1. Define configuration values under the `apm_configuration_default` block.

**Note:** If a configuration value is set through [environment variables](https://docs.datadoghq.com/tracing/trace_collection/library_config/), those values override the settings in `application_monitoring.yaml`.

As an example, the following enables profiling and Data Streams Monitoring, and disables tracing:

   ```yaml
   apm_configuration_default:
     DD_PROFILING_ENABLED: true
     DD_DATA_STREAMS_ENABLED: true
     DD_APM_TRACING_ENABLED: false
   ```

1. Restart services on the host to apply the configuration changes.

## Supported configuration options{% #supported-configuration-options %}

You can set any [library configuration environment variable](https://docs.datadoghq.com/tracing/trace_collection/library_config/) in `application_monitoring.yaml`.

**Note**: The Go SDK only supports APM tracing configuration options.

## SDK version requirements{% #sdk-version-requirements %}

The following minimum SDK versions support configuration through `application_monitoring.yaml`:

| Language | Minimum SDK version |
| -------- | ------------------- |
| Java     | v1.47.0             |
| Python   | v3.2.0              |
| Node.js  | v5.41.0             |
| .NET     | v3.25.0             |
| PHP      | v1.8.0              |
| Ruby     | v2.18.0             |
| Go       | v2.1.0              |

## Further reading{% #further-reading %}

- [Library configuration options](https://docs.datadoghq.com/tracing/trace_collection/library_config/)