netcat — quick reference

Xavier Briand

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Mar 28, 2019 · 1 min read

Arbitrary TCP and UDP connections and listens

Scan for listening daemon, without sending data

BSD
> nc -z example.com 20-30GNU
> nc -zv example.com 20-30

Client/Server

BSD
> nc -l 1234                                                # server> nc example.com 1234                                       # client> nc -l 1234 > out.txt                                      # server> nc example.com 1234 < in.txt                              # clientGNU
> nc -lp 1234