Linux chmod commands Modify directory permissions number meaning

The following are examples of the implications of common numbers represented by using absolute mode to modify directory permissions:

Mode	Significance
777	All users have read, write, and execute permissions on the file
755	The file owner has read, write, and execute permissions on the file, and group users and other users need read and execute permissions on the file
711	The file owner has read, write, and execute permissions on the file, and group users and other users have execute permissions on the file
644	File owners can read and write files, group users and other users can read files
640	File owners can read and write files, group users can read files, and other users cannot access files

Another common symbolic pattern meaning:

W.H.O.	User type	Significance
U	User	The owner of the file
G	Other	The group associated with the file
O	Other	All other users
A	All	Quite with Ugo, all the users

such as Mac Terminal (Class Linux system) modify file Directory command:

Chmod-r o+wx dirname/

Represents a recursive modification dirname the permissions for this folder are writable, and O indicates that this permission is granted to all other users.

-RW ——-(600) Only the owner has read and write permission
-rw-r–r– (644) Only the owner has read and write permission, the group and others only Read permission
-rwx--(700) Only the owner has the right to read, write, execute
-rwxr-xr-x (755) Only the owner has the right to read, write, execute, group and others only read and execute
-rwx–x–x (711) Only the owner has permission to read, write, execute, group and others only execute
-rw-rw-rw-(666) Everyone has access to read and write
-RWXRWXRWX (777) Everyone has access to read and write and execute