ls -al /lib/modules/
total 24
drwxr-xr-x  6 root root 4096 Jun  7 23:52 .
drwxr-xr-x 25 root root 4096 Feb 27 08:18 ..
drwxr-xr-x  5 root root 4096 Jun  7 23:30 3.13.0-46-generic
drwxr-xr-x  2 root root 4096 Jun  7 23:44 3.13.0-52-generic
drwxr-xr-x  5 root root 4096 Jun  7 23:30 3.13.0-53-generic
drwxr-xr-x  4 root root 4096 Nov 12  2014 3.2.0-23-generic-pae