usage: nc [-46AacCDdEFhklMnOortUuvz] [-K tc] [-b boundif] [-i interval] [-p source_port] [--apple-delegate-pid pid] [--apple-delegate-uuid uuid]
	  [-s source_ip_address] [-w timeout] [-X proxy_version]
	  [-x proxy_address[:port]] [hostname] [port[s]]
	Command Summary:
		-4		Use IPv4
		-6		Use IPv6
		-A		Set SO_RECV_ANYIF on socket
		-a		Set SO_AWDL_UNRESTRICTED on socket
		-b ifbound	Bind socket to interface
		-c		Send CRLF as line-ending
		-C		Don't use cellular connection
		-D		Enable the debug socket option
		-d		Detach from stdin
		-E		Don't use expensive interfaces
		-F		Do not use flow advisory (flow adv enabled by default)
		-G conntimo	Connection timeout in seconds
		-h		This help text
		-H keepidle	Initial idle timeout in seconds
		-I keepintvl	Interval for repeating idle timeouts in seconds
		-i secs		Delay interval for lines sent, ports scanned
		-J keepcnt	Number of times to repeat idle timeout
		-k		Keep inbound sockets open for multiple connects
		-K tclass	Specify traffic class
		-l		Listen mode, for inbound connects
		-L num_probes Number of probes to send before generating a read timeout event
		-m		Set SO_INTCOPROC_ALLOW on socket
		-n		Suppress name/port resolutions
		-M		Use MULTIPATH domain socket
		-N num_probes Number of probes to send before generating a write timeout event
		-O		Use old-style connect instead of connectx
		-p port		Specify local port for remote connects (cannot use with -l)
		-r		Randomize remote ports
		-s addr		Local source address
		-t		Answer TELNET negotiation
		-U		Use UNIX domain socket
		-u		UDP mode
		-v		Verbose
		-w secs		Timeout for connects and final net reads
		-X proto	Proxy protocol: "4", "5" (SOCKS) or "connect"
		-x addr[:port]	Specify proxy address and port
		-z		Zero-I/O mode [used for scanning]
		-o		Issue socket options after connect/bind
		--apple-delegate-pid pid	Set socket as delegate using pid