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netcat

  • One of my best inventions was netcat

        netcat hostname port
  • It would open and connect a network socket

    • Then it would copy stdin into the socket

    • and copy the socket's replies to stdout

  • For example, you could implement finger like this:

      #!/bin/sh
      echo $1 | netcat $2 79  
  • (The finger protocol was pretty simple.)


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