nc

Redirect I/O into a network stream through this versatile tool. More information: https://manned.org/nc.

• Start a listener on the specified TCP port and send a file into it:

nc -l -p port < filename

• Connect to a target listener on the specified port and receive a file from it:

nc host port > received_filename

• Scan the open TCP ports of a specified host:

nc -v -z -w timeout_in_seconds host start_port-end_port

• Start a listener on the specified TCP port and provide your local shell access to the connected party (this is dangerous and can be abused):

nc -l -p port -e shell_executable

• Connect to a target listener and provide your local shell access to the remote party (this is dangerous and can be abused):

nc host port -e shell_executable

• Act as a proxy and forward data from a local TCP port to the given remote host:

nc -l -p local_port | nc host remote_port

• Send an HTTP GET request:

echo -e "GET / HTTP/1.1\nHost: host\n\n" | nc host 80