still not fixed.
$ sudo find /lib/modules/4.4.0-53-generic/ /lib/modules/4.4.0-53-generic/ /lib/modules/4.4.0-53-generic/build
$ file /lib/modules/4.4.0-53-generic/build /lib/modules/4.4.0-53-generic/ /lib/modules/4.4.0-53-generic/build: symbolic link to `/usr/src/linux-headers-4.4.0-53-generic' /lib/modules/4.4.0-53-generic/: directory
still not fixed.
$ sudo find /lib/modules/ 4.4.0-53- generic/ 4.4.0-53- generic/ 4.4.0-53- generic/ build
/lib/modules/
/lib/modules/
$ file /lib/modules/ 4.4.0-53- generic/ build /lib/modules/ 4.4.0-53- generic/ 4.4.0-53- generic/ build: symbolic link to `/usr/src/ linux-headers- 4.4.0-53- generic' 4.4.0-53- generic/ : directory
/lib/modules/
/lib/modules/