What does pwd mean in linux?

In Linux, the full name of pwd is print working directory, which means printing the current working directory; the function of the pwd command is to display the current directory, and the syntax is "pwd [option]". The pwd command is mainly used to view the absolute path of the current directory when the current location is not certain.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

The full name of pwd in Linux is print working directory, which means printing the current working directory, which means displaying the current directory.

The function of the pwd command is to display the full path of the current working directory. It is mainly used to view the absolute path of the current directory through pwd when the current location is not sure.

pwd command syntax

pwd [选项]

Parameters:

• -L : --logical, displays the current path. When there is a connection file, directly displays the path of the connection file (this method is the default when no parameters are added), refer to Example 1.

• -p：--physical, displays the current path. When there is a connection file, the connection path is not used and the connection file is displayed directly. For the file pointed to, refer to Example 2. When a multi-layer connection file is included, the file ultimately pointed to by the connection file is displayed. Refer to Example 3.

• --help: Display help information.

• --version: Display version information.
  

pwd command example

Example 1: View the current The path

[root@localhost ~]# whoami
root
[root@localhost ~]# pwd
/root

whoami command is used to determine the currently logged in user, which will be introduced in detail later. As you can see, the current directory of the root user is its home directory /root.

Example 2:

[demo@localhost ~]# whoami
demo
[demo@localhost ~]# pwd
/home/demo

The above code shows that the user demo is currently logged in to the Linux system, and the current directory is demo’s home directory /home/demo.

Note that in the [demo@localhost ~]# section, although the current directory is also displayed (for example, ~ represents the home directory), this location will only List the last directory in the entire path, for example:

[root@localhost ~]# cd /var/mail
[root@localhost mail]# pwd
/var/mail

We know that directory names can be repeated in different directories. Therefore, only through the mail in [root@localhost mail], it is basically It is impossible to determine its specific location, but using the pwd command, you can output the full path of the current directory.

Example 3: View the current path, do not use the connection path

[root@localhost ~]# cd /var/   #进入/var目录，该目录下有个mail连接文件，方便对比查看
[root@localhost var]# ll
total 164
...
drwxr-xr-x 12 root root 4096 Apr 22 19:56 log
lrwxrwxrwx  1 root root   10 Oct 17  2015 mail -> spool/mail
drwxr-xr-x  2 root root 4096 May 11  2011 nis
...

[root@localhost var]# cd mail/   #进入mail目录，mail为连接文件。
[root@localhost mail]# pwd     #默认，使用连接文件，直接显示连接文件全路径。
/var/mail

[root@localhost mail]# pwd -P    #不使用逻辑路径，连接文件最终指向的文件
/var/spool/mail

Example 4: Multiple When connecting files in layers, the full path of the files ultimately pointed to by all connected files is displayed

[root@localhost ~]# ll      # /root目录下面有个dir1目录，test连接文件指向dir1目录
total 12
drwxr-xr-x 2 root root 4096 Apr 24 05:51 dir1
lrwxrwxrwx 1 root root    5 Apr 24 05:54 test -> dir1/
[root@localhost ~]# ll /home/   #/home目录下面有一个test连接文件，指向/root/test连接文件 
total 20
drwx------ 16 sgl  sgl  4096 Oct 17  2015 sgl
lrwxrwxrwx  1 root root   10 Apr 24 05:55 test -> /root/test


[root@localhost ~]# cd /home/test/   #通过cd命令进入/home/test
[root@localhost test]# pwd      #默认，只显示连接文件的全路径
/home/test
[root@localhost test]# pwd -P   # 显示连接文件最终指向的文件的全路径。注意这里不是/root/test。
/root/dir1

Related recommendations: "Linux Video Tutorial"

The above is the detailed content of What does pwd mean in linux?. For more information, please follow other related articles on the PHP Chinese website!