It seems that there might be an issue with the command provided by "小鱼" for installing ROS. It's possible that the command may not be compatible with the user's system or may have some syntax errors.

If the command is not working as expected, the user can try searching for alternative ways to install ROS, such as following the official installation instructions provided on the ROS website.

As for the specific error mentioned, it's not clear what command the user is referring to or what they are trying to achieve. Without more information, it's difficult to provide specific guidance on how to resolve the issue.

以上为生成回答，仅供参考～