为什么我在Linux中可以访问目录//？

Question

我在我的 ubuntu 服务器中找到了这个目录

momo@myubuntuserver:/$ cd /
momo@myubuntuserver:/$ pwd
/
momo@myubuntuserver:/$ cd //
momo@myubuntuserver://$ pwd
//
momo@myubuntuserver://$ cd ///
momo@myubuntuserver:/$ pwd
/

为什么这个目录存在？它是如何工作的？

Answer 1

从Bash 常见问题解答：

E10) Why does `cd //' leave $PWD as `//'?

POSIX.2, in its description of `cd', says that *three* or more leading
slashes may be replaced with a single slash when canonicalizing the
current working directory.

This is, I presume, for historical compatibility.  Certain versions of
Unix, and early network file systems, used paths of the form
//hostname/path to access `path' on server `hostname'.

Answer 2

//仅/在 Linux 上。按原样///，并且///bin//////ls是的替代名称/bin/ls。

键入/bin/pwd以找出真实的当前工作目录。