linux cd1.命令格式：2.命令功能3. 常用范例

cd -返回之前的目录

cd !$ 把上个命令的参数作为这个命令的参数

转载：

https://www.cnblogs.com/huchong/p/9829238.html 阅读目录(Content)

• 1.命令格式：
• 2.命令功能
• 3. 常用范例
• 1.进入系统根目录
• 2. 返回父级目录
• 3.进入当前目录的父目录的父目录
• 4. 进入当前用户主目录
• 5. 跳转到指定目录
• 6.返回进入此目录之前所在的目录
• 7. 把上个命令的参数作为cd参数使用

回到顶部(go to top)

cd   [目录名]
           

切换当前目录至 [目录名]

命令：

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

输出：

hc@hc-virtual-machine:~$ pwd
/home/hc
hc@hc-virtual-machine:~$ cd /
hc@hc-virtual-machine:/$ ls
bin    dev   initrd.img      lib64       mnt   root  snap      sys  var
boot   etc   initrd.img.old  lost+found  opt   run   srv       tmp  vmlinuz
cdrom  home  lib             media       proc  sbin  swapfile  usr

           

pwd的作用是查询当前所在目录

cd  ..
           

hc@hc-virtual-machine:~/PycharmProjects$ pwd
/home/hc/PycharmProjects
hc@hc-virtual-machine:~/PycharmProjects$ cd ..
hc@hc-virtual-machine:~$ pwd
/home/hc
           

cd  ../..
           

hc@hc-virtual-machine:~/PycharmProjects$ pwd
/home/hc/PycharmProjects
hc@hc-virtual-machine:~/PycharmProjects$ cd ../..
hc@hc-virtual-machine:/home$ pwd
/home
           

“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
           

直接输入cd，然后回车

hc@hc-virtual-machine:~/PycharmProjects/my_test$ pwd
/home/hc/PycharmProjects/my_test
hc@hc-virtual-machine:~/PycharmProjects/my_test$ cd 
hc@hc-virtual-machine:~$ pwd
/home/hc
           

上面的命令是我在非root用户下操作的，现在我切换到root用户下再操作一遍

hc@hc-virtual-machine:~/PycharmProjects/my_test$ sudo su
root@hc-virtual-machine:/home/hc/PycharmProjects/my_test# pwd
/home/hc/PycharmProjects/my_test
root@hc-virtual-machine:/home/hc/PycharmProjects/my_test# cd 
root@hc-virtual-machine:~# pwd
/root
           

命令2：

cd ~
           

输出

hc@hc-virtual-machine:~/PycharmProjects/my_test$ pwd
/home/hc/PycharmProjects/my_test
hc@hc-virtual-machine:~/PycharmProjects/my_test$ cd ~
hc@hc-virtual-machine:~$ pwd
/home/hc
           

命令

cd /home/hc/PycharmProjects/my_test/
           

hc@hc-virtual-machine:/$ pwd
/
hc@hc-virtual-machine:/$ cd /home/hc/PycharmProjects/my_test/
hc@hc-virtual-machine:~/PycharmProjects/my_test$ pwd
/home/hc/PycharmProjects/my_test
           

cd -
           

说明：自动跳转到进入此目录之前所在的目录，并输出所在目录名称

hc@hc-virtual-machine:/$ pwd
/
hc@hc-virtual-machine:/$ cd /home/hc/PycharmProjects/my_test/
hc@hc-virtual-machine:~/PycharmProjects/my_test$ pwd
/home/hc/PycharmProjects/my_test
hc@hc-virtual-machine:~/PycharmProjects/my_test$ cd -
/
hc@hc-virtual-machine:/$ pwd
/
           

cd !$
           

输出:

hc@hc-virtual-machine:~/PycharmProjects/my_test$ pwd
/home/hc/PycharmProjects/my_test
hc@hc-virtual-machine:~/PycharmProjects/my_test$ ls /opt/
google
hc@hc-virtual-machine:~/PycharmProjects/my_test$ cd !$
cd /opt/
hc@hc-virtual-machine:/opt$ pwd
/opt