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linux中cd命令使用详解,linuxcd使用详解

Linux cd 命令可以说是Linux中最基本的命令语句,其他的命令语句要进行操作,都是建立在使用 cd 命令上的。
所以,学习Linux 常用命令,首先就要学好 cd 命令的使用方法技巧。

1. 命令格式:
cd [目录名]

2. 命令功能:
切换当前目录至dirName

3. 常用范例

3.1 例一:进入系统根目录
命令:
cd /
输出:
[root@localhost ~]# cd /  
说明:进入系统根目录,上面命令执行完后拿ls命令看一下,当前目录已经到系统根目录了
命令:
cd .. 或者 cd .. //
输出:

复制代码 代码如下:


 [root@localhost soft]# pwd
 /opt/soft
 [root@localhost soft]# cd ..
 [root@localhost opt]# cd ..//
 [root@localhost /]# pwd
 /

说明:
进入系统根目录可以使用“ cd .. ”一直退,就可以到达根目录
命令:
cd ../.. //
输出:

复制代码 代码如下:


 [root@localhost soft]# pwd
 /opt/soft
 [root@localhost soft]# cd ../.. //
 [root@localhost /]# pwd
 /
 [root@localhost /]#

说明:使用cd 命令实现进入当前目录的父目录的父目录。

例2:使用 cd 命令进入当前用户主目录
“当前用户主目录”和“系统根目录”是两个不同的概念。进入当前用户主目录有两个方法。

命令1:
cd
输出:

复制代码 代码如下:


 [root@localhost soft]# pwd
 /opt/soft
 [root@localhost soft]# cd
 [root@localhost ~]# pwd
 /root

命令2:
cd ~
输出:

复制代码 代码如下:


  [root@localhost ~]# cd /opt/soft/
  [root@localhost soft]# pwd
  /opt/soft
  [root@localhost soft]# cd ~
  [root@localhost ~]# pwd
  /root    

例3:跳转到指定目录
命令:
cd /opt/soft
输出:

复制代码 代码如下:


 [root@localhost ~]# cd /opt/soft
 [root@localhost soft]# pwd
 /opt/soft
 [root@localhost soft]# cd jdk1.6.0_16/
 [root@localhost jdk1.6.0_16]# pwd
 /opt/soft/jdk1.6.0_16
 [root@localhost jdk1.6.0_16]#

说明:
跳转到指定目录,从根目录开始,目录名称前加 / ,当前目录内的子目录直接写名称即可

例四:返回进入此目录之前所在的目录
命令:
cd -
输出:

复制代码 代码如下:


 [root@localhost soft]# pwd
 /opt/soft
 [root@localhost soft]# cd -
 /root
 [root@localhost ~]# pwd
 /root
 [root@localhost ~]# cd -
 /opt/soft
 [root@localhost soft]#

例五:把上个命令的参数作为cd参数使用。

命令:
cd !$
输出:

复制代码 代码如下:


 [root@localhost soft]# cd !$
 cd -
 /root
 [root@localhost ~]# cd !$
 cd -
 /opt/soft
 [root@localhost soft]#

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