1、dirs1）功能显示当前目录栈中的所有记录（不带参数的dirs命令显示当前目录栈中的记录）2）语法（1）格式：dirs? [-clpv]? [+n]? [-n]（2）选项-c ?? 删除目录栈中的所有记录-l???? 以完整格式显示-p??? 一个目录一行的方式显示-v??? 每行一个目录来显示目录栈的内容，每个目录前加上的编号+N? 显示从左到右的第n个目录，数字从0开始-N?? 显示从右到左的第n个日录，数字从0开始注意：dirs始终显示当然目录,再是堆栈中的内容；即使目录堆栈为空,dirs命令仍然只显示当然目录2、pushd1）功能pushd命令常用于将目录加入到栈中，加入记录到目录栈顶部，并切换到该目录；若pushd命令不加任何参数，则会将位于记录栈最上面的2个目录对换位置2）语法（1）格式：pushd? [目录 | -N | +N]?? [-n]（2）选项目录?? 将该目录加入到栈顶，并执行"cd 目录"，切换到该目录+N?? 将第N个目录移至栈顶（从左边数起，数字从0开始）-N??? 将第N个目录移至栈顶（从右边数起，数字从0开始）-n??? 将目录入栈时，不切换目录

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pushd

Save and then change the current directory. With no arguments,?pushd?exchanges the top two directories.

SYNTAX
      pushd [dir | +N | -N] [-n]
KEY
   +N   Brings the Nth directory (counting from the left of the list 
        printed by dirs,starting with zero) to the top of the list by 
        rotating the stack. 
-N   Brings the Nth directory (counting from the right of the list

printed by dirs,starting with zero) to the top of the list by

rotating the stack. 
-n   Suppresses the normal change of directory when adding directories to the

stack,so that only the stack is manipulated. 
dir  Makes the current working directory be the top of the stack,and then executes

the equivalent of `cd dir'. cds to dir.

3、popd1）功能popd用于删除目录栈中的记录；如果popd命令不加任何参数，则会先删除目录栈最上面的记录，然后切换到删除过后的目录栈中的最上面的目录2）语法（1）格式：popd? [-N | +N]?? [-n]（2）选项+N?? 将第N个目录删除（从左边数起，数字从0开始）-N??? 将第N个目录删除（从右边数起，数字从0开始）-n??? 将目录出栈时，不切换目录

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popd

Remove the top entry from the directory stack,and?cd?to the new top directory.

SYNTAX
      popd [+N | -N] [-n]
Key

+N   Remove the Nth directory (counting from the left of the list

printed by dirs),starting with zero. 
-N   Remove the Nth directory (counting from the right of the list

printed by dirs),starting with zero. 
-n   Suppress the normal change of directory when removing directories from

the stack,so that only the stack is manipulated. 

When no arguments are given,popd removes the top directory from the stack and performs a cd to the new top directory.?The elements are numbered from 0 starting at the first directory listed with dirs; i.e.,popd is equivalent to popd +0.

参考：http://hi.baidu.com/linuxtrip/item/47a38c8eec00e98f4414cfb7

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