[root@host usr]# diff /lib/ /usr/lib | grep Common
Common subdirectories: /lib/lsb and /usr/lib/lsb
Common subdirectories: /lib/security and /usr/lib/security
Common subdirectories: /lib/tls and /usr/lib/tls
Common subdirectories: /lib/udev and /usr/lib/udev


[root@host /]# diff /lib /usr/lib | grep -vE 'Only|directories'

(nothing)