usage: netcat [-l] [-v] [-p port] [-n tcp]
options:
  -e	shell mode
  -h string
    	host addr to connect or listen (default "0.0.0.0")
  -help
    	print this help
  -l	listen mode
  -n string
    	network protocol (default "tcp")
  -p int
    	host port to connect or listen (default 4000)
  -v	verbose mode

listen: 
cdk nc -l -v -p <port>
connect:
cdk nc -h <host> -p <port>

cdk nc -l -v -p <port> < file
cdk nc -h <host> -p <port> > file

cdk nc -l -v -p <port> -e
cdk nc -h <host> -p <port>

cdk nc -l -v -p <port>
cdk nc -h <host> -p <port> -e