How to copy permissions and owner from one directory to another?

Question

linux

The essence of the problem: access rights and the owner of the /usr directory and its subdirectories have been lost
Question: can I restore it? for example, copy ONLY the rights and the owner from another similar PC, with a similar OS (Linux Mageia).

Thanks in advance!!!
PS Interested in answers with solutions, and not with comments "how it happened" and so on ...

Answer 1

As for the user - start with find /usr \! -user root
I got only three lines of such.
As for the rights, I think it's similar - in the mass the same, exceptions are found by find -perm (separately for folders and files).

Answer 2

As far as I understand, your linux is based on rpm.
# rpm -a -V
will show you the wrong files. By the way, it might be easier to reinstall broken rpm.

Answer 3

To you to advise against a DBMS? It already depends then on the scale of the enterprise. And yes, graphic files can be saved in the database using binary data types, but there is a limited size, you will have to make text columns indicating the full paths to the files. Do you really need it?

Answer 4

google firebase if free