sudo ls -al /boot/
total 208583
drwxr-xr-x  4 root root     2048 Jan  4 13:56 .
drwxr-xr-x 26 root root     4096 Nov 30 00:51 ..
-rw-r--r--  1 root root  1162712 Aug 13 17:45 abi-3.13.0-34-generic
-rw-r--r--  1 root root  1163858 Aug 15 03:56 abi-3.13.0-35-generic
-rw-r--r--  1 root root  1163858 Sep  3 23:24 abi-3.13.0-36-generic
-rw-r--r--  1 root root  1164489 Sep 22 23:24 abi-3.13.0-37-generic
-rw-r--r--  1 root root  1164547 Oct 28 14:25 abi-3.13.0-39-generic
-rw-r--r--  1 root root  1164509 Nov 13 18:30 abi-3.13.0-40-generic
-rw-r--r--  1 root root   919001 Jun  6  2013 abi-3.8.0-25-generic
-rw-r--r--  1 root root   165611 Aug 13 17:45 config-3.13.0-34-generic
-rw-r--r--  1 root root   165652 Aug 15 03:56 config-3.13.0-35-generic
-rw-r--r--  1 root root   165671 Sep  3 23:24 config-3.13.0-36-generic
-rw-r--r--  1 root root   165712 Sep 22 23:24 config-3.13.0-37-generic
-rw-r--r--  1 root root   165712 Oct 28 14:25 config-3.13.0-39-generic
-rw-r--r--  1 root root   165745 Nov 13 18:30 config-3.13.0-40-generic
-rw-r--r--  1 root root   154943 Jun  6  2013 config-3.8.0-25-generic
drwxr-xr-x  5 root root     1024 Dec 15 11:40 grub
-rw-r--r--  1 root root 20334762 Aug 15 18:03 initrd.img-3.13.0-34-generic
-rw-r--r--  1 root root 20349703 Sep 10 20:43 initrd.img-3.13.0-35-generic
-rw-r--r--  1 root root 20357996 Oct  3 20:58 initrd.img-3.13.0-36-generic
-rw-r--r--  1 root root 20356512 Oct 11 16:05 initrd.img-3.13.0-37-generic
-rw-r--r--  1 root root 20356421 Nov 15 20:31 initrd.img-3.13.0-39-generic
-rw-r--r--  1 root root 20363330 Nov 30 00:52 initrd.img-3.13.0-40-generic
-rw-r--r--  1 root root 17398868 Apr 25  2014 initrd.img-3.8.0-25-generic
drwxr-xr-x  2 root root    12288 Jun 18  2013 lost+found
-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  3381262 Aug 13 17:45 System.map-3.13.0-34-generic
-rw-------  1 root root  3386444 Aug 15 03:56 System.map-3.13.0-35-generic
-rw-------  1 root root  3386479 Sep  3 23:24 System.map-3.13.0-36-generic
-rw-------  1 root root  3386945 Sep 22 23:24 System.map-3.13.0-37-generic
-rw-------  1 root root  3386936 Oct 28 14:25 System.map-3.13.0-39-generic
-rw-------  1 root root  3387231 Nov 13 18:30 System.map-3.13.0-40-generic
-rw-------  1 root root  3060761 Jun  6  2013 System.map-3.8.0-25-generic
-rw-------  1 root root  5797728 Aug 13 17:45 vmlinuz-3.13.0-34-generic
-rw-------  1 root root  5806368 Aug 15 03:56 vmlinuz-3.13.0-35-generic
-rw-------  1 root root  5806848 Sep  3 23:24 vmlinuz-3.13.0-36-generic
-rw-------  1 root root  5808832 Sep 22 23:24 vmlinuz-3.13.0-37-generic
-rw-------  1 root root  5808544 Oct 28 14:25 vmlinuz-3.13.0-39-generic
-rw-------  1 root root  5808960 Nov 13 18:30 vmlinuz-3.13.0-40-generic
-rw-------  1 root root  5357392 Jun  6  2013 vmlinuz-3.8.0-25-generic