nc [OPTIONS] HOST PORT - connect nc [OPTIONS] -l -p PORT [HOST] [PORT] - listen
Options:
-e PROG Run PROG after connect (must be last)
-l Listen mode, for inbound connects
-n Don't do DNS resolution
-s ADDR Local address
-p PORT Local port
-u UDP mode
-v Verbose
-w SEC Timeout for connects and final net reads
-i SEC Delay interval for lines sent
-o FILE Hex dump traffic
-z Zero-I/O mode (scanning)
