Mention the default listening port in the README.
Related to
@@ -18,6 +18,8 @@ can be used.
If you are new to Prometheus and `node_exporter` there is a [simple step-by-step guide](https://prometheus.io/docs/guides/node-exporter/).
+The `node_exporter` listens on HTTP port 9100 by default. See the `--help` output for more options.
+
### Ansible
For automated installs with [Ansible](https://www.ansible.com/), there is the [Cloud Alchemy role](https://github.com/cloudalchemy/ansible-node-exporter).
