什么是路径//，它与/有什么不同？

We know root directory is /, and according to posix, there is another directory // which differs from /. When you ls / and ls //, the output is the same, so as stat, however if you cd / and cd //, they are different, though the directory content are the same. That really confused me. Anyone got an answer?We know root directory is /, and according to p