帮我看看这个问题，

女狼一共舞

Now there are two files named good.txt and bad.txt in the sub-directory test, how can you exchange the names of the two files?
（交换两个文件的名字）

xman099

mv good.txt  tmp11111111111.txt
mv bad.txt good.txt
mv  tmp11111111111.txt  bad.txt

女狼一共舞

呵呵，谢谢