Linux directory permission inheritance
directory, file-permissions, folder-permissions, linux, ubuntu
Solution
The way permissions affect paths is explained in the path_resolution man page: http://linux.die.net/man/2/path_resolution
The only permission on folder A that matters is the search (execute) permission: if you don't have it you can't descend to folder B. Other than that there is no relation between permissions of A and B, for example if A is read-only and B is not, or even if you don't even have read permission to A, you still can create and delete files in B.
Problem
Can someone explain to me how directory permissions are inherited in Linux (Ubuntu, specifically)? For example, what if I have the following directory structure: ``` folder_A folder_B ``` Do folder_A's permissions always override folder_B's? Is there any difference if folder_A's permissions are more restrictive than folder_B's, or vice-versa? My guess would be that if folder_B had more restrictive permissions, it would override folder_A's, but if folder_A had more restrictive permissions, then it would override its children.