christoph@christoph-pi:~$ ll / | grep christoph
drwxrwxr-x  23 christoph christoph       4096 Dec  8 16:30 lib/
christoph@christoph-pi:~$ ll /lib | grep christoph
drwxrwxr-x 23 christoph christoph  4096 Dec  8 16:30 ./
drwxrwxr-x 71 christoph christoph 36864 Dec 14 22:52 firmware/
christoph@christoph-pi:~$ ll /lib/firmware/ | grep christoph
drwxrwxr-x 71 christoph christoph   36864 Dec 14 22:52 ./
drwxrwxr-x 23 christoph christoph    4096 Dec  8 16:30 ../
-rw-rw-r--  1 christoph christoph   35976 Feb 27  2016 BCM43430A1.hcd
christoph@christoph-pi:~$ ll /lib/firmware/BCM43430A1.hcd | grep christoph
-rw-rw-r-- 1 christoph christoph 35976 Feb 27  2016 /lib/firmware/BCM43430A1.hcd