fmt.Fprintf(os.Stderr, "Usage: %s [options] -all\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Usage: %s [options] -node NODE[,...]\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Usage: %s [options] -node NODE -pkt PKT\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Usage: %s [options] -all\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Usage: %s [options] -node NODE[,...]\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Usage: %s [options] -node NODE -pkt PKT\n", os.Args[0])