Detailed explanation of the meaning of permissions on Linux directories and files

The difference between ls -l and ls -al: the first will not display hidden files, and the second will display hidden files (files starting with a dot (.)). This article will share with you the meaning of permissions on Linux directories and files. I hope it can help you.

1. The importance of permissions to files (r, w, x are mainly for the content of the file)

r: Readable file content

w: Yes Edit, add, and modify the contents of the file (but not delete files)

x: The file has permissions that can be executed by the system

2. The importance of permissions to directories

r: Has the permission to read the directory list, can query the file name list in this directory, and cannot switch to the directory

w: Has very important permissions, allowing users to enter the directory Delete, update, and create new files or directories

x: Users can enter the directory and call the information in the directory. That is, you can execute the cd command. It means searching and accessing the directory

Note: When you want to develop a directory for anyone to browse, you should give at least r and x permissions. W cannot be given casually; x being in the directory is related to whether you can enter the directory.

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