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How to analyze the difference between Linux system directory and file permissions, in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and easy way.

The permissions of files and directories are simple on the surface, but it takes some effort to really understand them. File permissions are relatively simple, but there are a few points to pay special attention to:

R: read permission, which refers to the specific contents of the file, such as what is written in the text file. The content of "read" here does not include the attributes of the file, such as size, modification date, permissions, and so on. Because it's not part of the file.

W: write permission, edit, modify or add the contents of the file, but does not include deleting the file. (determined by the w permission of the parent directory)

X: execute permissions. However, having the permission to execute the file does not necessarily mean that the file can be executed. It also depends on whether you have the x permission of the parent directory.

In short, for the r, w, x of the file, it is mainly aimed at the "content of the file", which has nothing to do with the existence of the file name. Because the file records the actual data (relative to the directory).

Permissions for the directory:

Relative to the actual data that the file is recorded, the main content of the directory record is the list of file names.

R (read contents in directory): reads a list of directory structures. Such as ls, find and so on. If you can view the file name, the properties of the file may not necessarily be viewable, and you have to look at the x permission of the directory.

W (modify contents of directory): permission to modify the directory structure list. These include: create new files and directories, delete files and directories (and ignore their permissions), rename files and directories, and move files and directories.

For example, an ordinary user has the w permission of a directory (but also the x permission of the directory), and even if there are root files in that directory, he can delete them.

X (access directory): means whether the user can enter the directory and use this directory as the working directory. Without the x permission of a directory, you cannot change to that directory, and no files in that directory can be viewed, modified, executed, or deleted. (you can only see the file name at most, as long as you have r permission for the parent directory).

The answer to the question on how to analyze the difference between Linux system directory and file permissions is shared here. I hope the above content can be of some help to everyone. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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