Hi i would like to give multiple groups as owner of a file is it possible in linux?
You have groups red, orange, yellow, green, blue, purple.
You want to grant access to red green and blue and deny the others.
The usual approach is to create a meta group, primary, and have the members of red green and blue also be members of primary.
The alternative would be to use access control lists.
But there is no lazy way forward.