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Jun 23rd, 2018
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  1. 1. Spawn a netcat server: `nc -l 8080`
  2. 2. Run the parent: `ruby parent.rb`
  3. 3. Spawn a child: `start`
  4. 4. Look at the output.
  5. 5. Kill the child: `stop`
  6. 6. Change `happy` to `sad` in `child.rb`
  7. 7. Spawn new child: `start`
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