Linux runs differences based on Read permissions and permissions for this folder

Suppose you use LS under Linux. Careful you will find that actually the folder has permission to run. For example:

DRWXRWXR-X CL CL 4096 9 25 14:22.
DRWXR-XR-X CL cl 4096 October 10 16:00. /
Drwxrwxr-x 5 CL cl 4096 September 10:58 algorithm/
Drwxrwxr-x 2 CL cl 4096 September 21:44 temp/

Why?? Check on the Internet to find that is the meaning:

The operational permissions for a folder indicate whether you can run commands under a folder. Assuming that the folder does not have the-X permission, you cannot run any commands on the folder or even CD into the folder. even though the folder still has the-R Read permission (this place is very easy to err, think that having read permission can go into the folder to read the file under the folder).

Assuming that the folder has the-X permission but does not have the-r permission, the user can run the command and be able to access the CD folder. But because there is no Read permission for the folder. So under the folder. Even though you can run the LS command, you still do not have permission to read the document under the folder.

It records, enhances memory!

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Linux runs differences based on Read permissions and permissions for this folder