200: meow
this post was submitted on 26 Sep 2023
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400: meow
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The nc (or netcat utility is used for just about anything under the sun involving TCP, UDP, or UNIX sockets. It can open TCP connections, send UDP packets, listen on arbitrary TCP and UDP ports, do port scanning, and deal with both IPv4 and IPv6. Unlike telnet(1), nc scripts nicely, and separates error messages onto standard error instead of sending them to standard output, as telnet(1) does with some.
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