The given port must not be a privileged port, i.e. allowed range is [1024, 65535]. The command will fail if the unix_socket argument specifies an already existing file. UNIX sockets are not supported on Windows.
If -raw is specified, the telnet connections will use raw mode, where telnet control codes will not be interpreted.
If -shutdown is specified, any open telnet connections will be shutdown before starting a new server.