So generally, if you don't get an error message in a command line environment like this, that's good.
一般来说,如果你在命令行界面,没有收到错误信息,那就是好消息。
> David: An error message of some sort like "file not found" or "commands not found."
>,大卫:会出现一个错误信息像“没找到文件“,或“没找到命令“
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