weston@Lenovo-Yoga-2-Pro:~$ ls -al /usr/src/ ; ls -al /lib/modules/ ; ls -al /boot
total 40
drwxr-xr-x 10 root root 4096 Nov 20 18:18 .
drwxr-xr-x 12 root root 4096 Sep 10 18:21 ..
drwxr-xr-x 24 root root 4096 Aug 9 12:48 linux-headers-3.16.0-30
drwxr-xr-x 7 root root 4096 Aug 9 13:20 linux-headers-3.16.0-30-generic
drwxr-xr-x 24 root root 4096 Sep 10 16:02 linux-headers-3.16.0-49
drwxr-xr-x 7 root root 4096 Sep 10 16:02 linux-headers-3.16.0-49-generic
drwxr-xr-x 24 root root 4096 Nov 6 12:32 linux-headers-3.19.0-32
drwxr-xr-x 7 root root 4096 Nov 6 12:32 linux-headers-3.19.0-32-generic
drwxr-xr-x 24 root root 4096 Nov 11 14:21 linux-headers-3.19.0-33
drwxr-xr-x 7 root root 4096 Nov 11 14:21 linux-headers-3.19.0-33-generic
lrwxrwxrwx 1 root root 32 Nov 10 09:54 vboxhost-5.0.10 -> ../share/virtualbox/src/vboxhost
total 24
drwxr-xr-x 6 root root 4096 Nov 20 18:24 .
drwxr-xr-x 27 root root 4096 Oct 23 16:36 ..
drwxr-xr-x 5 root root 4096 Aug 9 13:21 3.16.0-30-generic
drwxr-xr-x 5 root root 4096 Sep 10 16:03 3.16.0-49-generic
drwxr-xr-x 6 root root 4096 Nov 6 18:45 3.19.0-32-generic
drwxr-xr-x 6 root root 4096 Nov 16 16:27 3.19.0-33-generic
total 114876
drwxr-xr-x 5 root root 4096 Nov 20 16:58 .
drwxr-xr-x 24 root root 4096 Nov 20 15:50 ..
-rw-r--r-- 1 root root 1207386 Jan 15 2015 abi-3.16.0-30-generic
-rw-r--r-- 1 root root 1207674 Sep 9 04:13 abi-3.16.0-49-generic
-rw-r--r-- 1 root root 1271689 Oct 22 05:14 abi-3.19.0-32-generic
-rw-r--r-- 1 root root 1271689 Nov 6 12:39 abi-3.19.0-33-generic
-rw-r--r-- 1 root root 171768 Jan 15 2015 config-3.16.0-30-generic
-rw-r--r-- 1 root root 171832 Sep 9 04:13 config-3.16.0-49-generic
-rw-r--r-- 1 root root 177790 Oct 22 05:14 config-3.19.0-32-generic
-rw-r--r-- 1 root root 177790 Nov 6 12:39 config-3.19.0-33-generic
drwxr-xr-x 4 root root 4096 Dec 31 1969 efi
drwxr-xr-x 3 root root 4096 Nov 20 16:58 extlinux
drwxr-xr-x 6 root root 4096 Nov 20 16:58 grub
-rw-r--r-- 1 root root 5840263 Aug 9 13:21 initrd.img-3.16.0-30-generic
-rw-r--r-- 1 root root 19445521 Sep 10 16:04 initrd.img-3.16.0-49-generic
-rw-r--r-- 1 root root 19799543 Nov 6 12:34 initrd.img-3.19.0-32-generic
-rw-r--r-- 1 root root 19800562 Nov 11 14:26 initrd.img-3.19.0-33-generic
-rw-r--r-- 1 root root 176500 Mar 12 2014 memtest86+.bin
-rw-r--r-- 1 root root 178176 Mar 12 2014 memtest86+.elf
-rw-r--r-- 1 root root 178680 Mar 12 2014 memtest86+_multiboot.bin
-rw------- 1 root root 3511040 Jan 15 2015 System.map-3.16.0-30-generic
-rw------- 1 root root 3515972 Sep 9 04:13 System.map-3.16.0-49-generic
-rw------- 1 root root 3628149 Oct 22 05:14 System.map-3.19.0-32-generic
-rw------- 1 root root 3628149 Nov 6 12:39 System.map-3.19.0-33-generic
-rw------- 1 root root 6345104 Jan 15 2015 vmlinuz-3.16.0-30-generic
-rw------- 1 root root 6358736 Sep 9 04:13 vmlinuz-3.16.0-49-generic
-rw------- 1 root root 6360664 Sep 10 16:04 vmlinuz-3.16.0-49-generic.efi.signed
-rw------- 1 root root 6572944 Oct 22 05:14 vmlinuz-3.19.0-32-generic
-rw------- 1 root root 6572432 Nov 6 12:39 vmlinuz-3.19.0-33-generic