brooklyn-docs/guide/yaml/example_yaml/vanilla-bash-netcat.yaml

name: Simple Netcat Server Example
location: localhost
services:
- type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
  name: Simple Netcat Server
  launch.command: |
    echo hello | nc -l 4321 &
    echo $! > $PID_FILE