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The Linux command to enter the directory is "cd". The cd command is used to switch the working directory and can enter the specified directory. There are two syntaxes: 1. "cd [relative path or absolute path]"; 2. "cd [special character]", followed by special characters to express a fixed Meaning, for example, "cd ~username" means entering the home directory of the specified user.
#The operating environment of this tutorial: CentOS 6 system, Dell G3 computer.
The Linux command to enter the directory is "cd".
cd command is the abbreviation of Change Directory. It is used to switch the working directory and enter the specified directory.
The basic format of the cd command is as follows:
cd [相对路径或绝对路径]
In addition, the cd command can be followed by some special symbols to express fixed meanings. Syntax:
cd [特殊字符]
| Special symbols | Function |
|---|---|
| ~ | Represents the home directory of the currently logged in user |
| ~Username | means switching to the home directory of the specified user |
| - | represents the last directory |
| . | represents the current directory |
| .. | represents the upper-level directory |
Their usage is:
1. Enter the home directory of the currently logged in user
cd ~ #表示回到自己的主目录，对于 root 用户，其主目录为 /root cd #没有加上任何路径，也代表回到当前登录用户的主目录 cd ~vbird #代表切换到 vbird 这个用户的主目录，亦即 /home/vbird
2. Enter the current upper-level directory
cd .. #表示切换到目前的上一级目录，亦即是 /root 的上一级目录的意思；
3. Return to the directory just now
cd -
[Example 1] Learn how to use cd -.
[root@localhost ~]# cd /usr/local/src #进入/usr/local/src目录 [root@localhost src]# cd - /root [root@localhost ~]# #"cd -"命令回到进入 src 目录之前的主目录 [root@localhost ~]# cd - /usr/local/src [root@localhost src]# #再执行一遍"cd -"命令，又回到了 /usr/local/src 目录
【Example 2】Learn the usage of cd . and cd ...
[root@localhost ~]# cd /usr/local/src #进入测试目录 [root@localhost src]# cd .. #进入上级目录 [root@localhost local]# pwd /usr/local #pwd是査看当前所在目录的命令，可以看到我们进入了上级目录 /usr/local [root@localhost local]# cd . #进入当前目录 [root@localhost local]# pwd /usr/local #这个命令不会有目录的改变，只是告诉大家"."代表当前目录
Description: The pwd command is used to display the current directory
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