• dirs: Display the directory stack
• pushd: Push directory into the stack
• popd: Pop directory from the stack and cd to it
通常情况下执行这三个命令会有以下结果：
jack@Ubuntu:~$ dirs ~ jack@Ubuntu:~$ pushd bash: pushd: 无其他目录 jack@Ubuntu:~$ popd bash: popd: 目录栈为空
现在我们新建几个temp 目录：
jack@Ubuntu:~$ mkdir /tmp/dir1 jack@Ubuntu:~$ mkdir /tmp/dir2 jack@Ubuntu:~$ mkdir /tmp/dir3 jack@Ubuntu:~$ mkdir /tmp/dir4 jack@Ubuntu:~$ cd /tmp/dir1 jack@Ubuntu:/tmp/dir1$ pushd . /tmp/dir1 /tmp/dir1 jack@Ubuntu:/tmp/dir1$ cd /tmp/dir2 jack@Ubuntu:/tmp/dir2$ pushd . /tmp/dir2 /tmp/dir2 /tmp/dir1 jack@Ubuntu:/tmp/dir2$ cd /tmp/dir3 jack@Ubuntu:/tmp/dir3$ pushd . /tmp/dir3 /tmp/dir3 /tmp/dir2 /tmp/dir1 jack@Ubuntu:/tmp/dir3$ cd /tmp/dir4 jack@Ubuntu:/tmp/dir4$ pushd . /tmp/dir4 /tmp/dir4 /tmp/dir3 /tmp/dir2 /tmp/dir1 jack@Ubuntu:/tmp/dir4$ dirs /tmp/dir4 /tmp/dir4 /tmp/dir3 /tmp/dir2 /tmp/dir1
【ps：打印出来的第一个目录/tmp/dir4并不是目录栈里的内容，而是当前目录。其后面的部分才是push到的目录栈的全部内容，很显然第一个push到栈里的是放在栈的最后面的，或者说是放在栈的最底部的】
下面我就把他pop出来：
jack@Ubuntu:/tmp/dir4$ popd /tmp/dir4 /tmp/dir3 /tmp/dir2 /tmp/dir1 jack@Ubuntu:/tmp/dir4$ pwd /tmp/dir4 jack@Ubuntu:/tmp/dir4$ popd /tmp/dir3 /tmp/dir2 /tmp/dir1 jack@Ubuntu:/tmp/dir3$ pwd /tmp/dir3 jack@Ubuntu:/tmp/dir3$ popd /tmp/dir2 /tmp/dir1 jack@Ubuntu:/tmp/dir2$ pwd /tmp/dir2 jack@Ubuntu:/tmp/dir2$ popd /tmp/dir1 jack@Ubuntu:/tmp/dir1$ pwd /tmp/dir1 jack@Ubuntu:/tmp/dir1$ popd bash: popd: 目录栈为空
栈的后进先出在这里可以得到展示。
--EOF--