4 examples for nc

  # netcat-traditional (natcat-openbsd may differ)
# (Listens on/connects to) a port and communicate on STDIN/STDOUT

# listening
$ nc -l -p 8888

# connecting
$ nc example.com 80
HEAD / HTTP/1.1

        

  # Share file through port 80
nc -v -l 80 < file.ext
        

  # A quick check for port information including NAT
nc -vz example.com 80
        

  # Scan all http default ports for a given ip block (e.g 192.168.1.xxx)
for i in {1..255}; do nc -v -n -z -w 1 192.168.1.$i 80; done