"Linux command line Daquan" series (Ii., navigation)

The navigation of the file system is a continuous process of accessing nodes in the tree structure.

File System Tree

linux only One inverted file system tree

different devices can be mounted on this same tree

Files and subdirectories are part of this tree, the top-most of which is the root directory

Directory

Depending on the relative relationship between tree nodes, there are:

• Current working directory
  The directory where the user is located
  Delegate symbol:.
  Print path command: pwd
  Back to previous working directory: cd-
• Home Directory
  The current working directory is set to the primary directory when the system is first logged on or when the terminal emulator is first launched
  For ordinary users, the home directory is the only place where write operations can be performed
  Return root directory: CD
  Returns the home directory for the specified user: Cd~username
• Parent Directory
• Sub-directories

Show Directory Contents

ls: Displays the current directory file and directory

Attention:
To. The file that starts with is not displayed by default
-ls can also display other directory contents

Directory Navigation

for auxiliary navigation, Linux provides special symbols:. and.:

. : Current working directory

.. : Current working Directory parent directory

Note:./Can be ignored

Relative path

Route to the specified directory relative to the current working directory

Absolute path

Route to the specified directory relative to the home directory

"Linux command line Daquan" series (Ii., navigation)