netcat

Forward stdin/stdout to a file or network connection. When listening the COMMAND line is executed as a child process to handle an incoming connection. With no COMMAND -l forwards the connection to stdin/stdout. If no -p specified, -l prints the port it bound to and backgrounds itself (returning immediately). For a quick-and-dirty server, try something like: netcat -s 127.0.0.1 -p 1234 -L sh -l Or use "stty 115200 -F /dev/ttyS0 && stty raw -echo -ctlecho" with netcat -f to connect to a serial port.

netcat [-46ELlntUu] [-pqWw #] [-s addr] [-o FILE] {IPADDR PORTNUM|-f FILENAME|COMMAND...}

Show 18 options

-4Force IPv4

-6Force IPv6

-EForward stderr

-fUse FILENAME (ala /dev/ttyS0) instead of network

-LListen and background each incoming connection (server mode)

-lListen for one incoming connection, then exit

-nNo DNS lookup

-o FILEHex dump to FILE (show packets, -o- writes hex only to stdout)

-OHex dump to FILE (streaming mode)

-pLocal port number

-qQuit SECONDS after EOF on stdin, even if stdout hasn't closed yet

-sLocal source address

-tAllocate tty

-uUse UDP

-UUse a UNIX domain socket

-WSECONDS timeout for more data on an idle connection

-wSECONDS timeout to establish connection

-zzero-I/O mode [used for scanning]

This command is an alias of nc.