DOKK / manpages / debian 10 / ucspi-tcp-ipv6 / tcpcat.1.en
tcpcat(1) General Commands Manual tcpcat(1)

tcpcat - print data from a TCP port

tcpcat host port

tcpcat connects to port on host and prints any data it receives.

tcpcat can be used to transfer binary data. It does no conversions.

tcpclient(1)