In my opinion, it is not best to overwrite this file if you already have it.

在我看来，这不是最好的覆盖此文件如果您已经有了。

youdao

Note that this can only save you while you're trying to redirect output to an existing file — it isn't any help if you're using cp or mv to overwrite the file.

注意，这只能防止把输出重定向到现有文件；如果使用cp或mv覆盖文件，这个变量没有任何帮助。

youdao