:~$ uname -r
3.13.0-62-generic
:~$ dpkg --list | grep linux-image
rc  linux-image-3.13.0-32-generic       3.13.0-32.57                         amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-54-generic       3.13.0-54.91                         amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-55-generic       3.13.0-55.94                         amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-57-generic       3.13.0-57.95                         amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-58-generic       3.13.0-58.97                         amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-59-generic       3.13.0-59.98                         amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-61-generic       3.13.0-61.100                        amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-62-generic       3.13.0-62.102                        amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
iF  linux-image-3.13.0-63-generic       3.13.0-63.103                        amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-3.13.0-65-generic       3.13.0-65.105                        amd64        Linux kernel image for version 3.13.0 on 64 bit x86 SMP
rc  linux-image-extra-3.13.0-32-generic 3.13.0-32.57                         amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-54-generic 3.13.0-54.91                         amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-55-generic 3.13.0-55.94                         amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-57-generic 3.13.0-57.95                         amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-58-generic 3.13.0-58.97                         amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-59-generic 3.13.0-59.98                         amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-61-generic 3.13.0-61.100                        amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
ii  linux-image-extra-3.13.0-62-generic 3.13.0-62.102                        amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
iU  linux-image-extra-3.13.0-63-generic 3.13.0-63.103                        amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
iU  linux-image-extra-3.13.0-65-generic 3.13.0-65.106                        amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
iU  linux-image-extra-3.13.0-66-generic 3.13.0-66.108                        amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
iU  linux-image-extra-3.13.0-74-generic 3.13.0-74.118                        amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
iU  linux-image-extra-3.13.0-76-generic 3.13.0-76.120                        amd64        Linux kernel extra modules for version 3.13.0 on 64 bit x86 SMP
iU  linux-image-generic                 3.13.0.76.82                         amd64        Generic Linux kernel image
:~$ find /boot -type f -printf "%-16s %p\n" | sort -nr | head -n 20
find: `/boot/lost+found': Permission denied
20152021         /boot/initrd.img-3.13.0-59-generic
20151317         /boot/initrd.img-3.13.0-61-generic
20149986         /boot/initrd.img-3.13.0-62-generic
20149815         /boot/initrd.img-3.13.0-58-generic
20147467         /boot/initrd.img-3.13.0-54-generic
20145874         /boot/initrd.img-3.13.0-55-generic
20144804         /boot/initrd.img-3.13.0-57-generic
5823136          /boot/vmlinuz-3.13.0-58-generic
5822880          /boot/vmlinuz-3.13.0-59-generic
5822208          /boot/vmlinuz-3.13.0-61-generic
5821984          /boot/vmlinuz-3.13.0-55-generic
5821664          /boot/vmlinuz-3.13.0-54-generic
5821152          /boot/vmlinuz-3.13.0-63-generic
5820896          /boot/vmlinuz-3.13.0-62-generic
5820800          /boot/vmlinuz-3.13.0-57-generic
5820640          /boot/vmlinuz-3.13.0-65-generic
3392306          /boot/System.map-3.13.0-62-generic
3392068          /boot/System.map-3.13.0-65-generic
3392068          /boot/System.map-3.13.0-63-generic
3391819          /boot/System.map-3.13.0-61-generic
:~$ sudo apt-get purge linux-image-3.13.0-59-generic 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 linux-image-extra-3.13.0-59-generic : Depends: linux-image-3.13.0-59-generic but it is not going to be installed
 linux-image-extra-3.13.0-66-generic : Depends: linux-image-3.13.0-66-generic but it is not going to be installed
 linux-image-extra-3.13.0-74-generic : Depends: linux-image-3.13.0-74-generic but it is not going to be installed
 linux-image-extra-3.13.0-76-generic : Depends: linux-image-3.13.0-76-generic but it is not going to be installed
 linux-image-generic : Depends: linux-image-3.13.0-76-generic but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).