/boot$ ls -al /boot
total 191889
drwxr-xr-x 5 root root 3072 Feb 28 03:13 .
drwxr-xr-x 24 root root 4096 Feb 27 03:17 ..
-rw-r--r-- 1 root root 1271765 Dec 31 17:40 abi-3.19.0-43-generic
-rw-r--r-- 1 root root 1271765 Jan 18 18:05 abi-3.19.0-47-generic
-rw-r--r-- 1 root root 1271904 Jan 22 15:22 abi-3.19.0-49-generic
-rw-r--r-- 1 root root 1271993 Feb 26 23:32 abi-3.19.0-51-generic
-rw-r--r-- 1 root root 177808 Dec 31 17:40 config-3.19.0-43-generic
-rw-r--r-- 1 root root 177808 Jan 18 18:05 config-3.19.0-47-generic
-rw-r--r-- 1 root root 177808 Jan 22 15:22 config-3.19.0-49-generic
-rw-r--r-- 1 root root 177808 Feb 26 23:32 config-3.19.0-51-generic
drwxr-xr-x 3 root root 4096 Jan 1 1970 efi
drwxr-xr-x 5 root root 1024 Feb 28 03:13 grub
-rw-r--r-- 1 root root 30548129 Jan 7 17:38 initrd.img-3.19.0-43-generic
-rw-r--r-- 1 root root 30551869 Jan 20 12:59 initrd.img-3.19.0-47-generic
-rw-r--r-- 1 root root 30559404 Feb 19 02:19 initrd.img-3.19.0-49-generic
-rw-r--r-- 1 root root 30558692 Feb 28 03:13 initrd.img-3.19.0-51-generic
drwx------ 2 root root 12288 Jan 1 16:23 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 3628871 Dec 31 17:40 System.map-3.19.0-43-generic
-rw------- 1 root root 3628871 Jan 18 18:05 System.map-3.19.0-47-generic
-rw------- 1 root root 3630320 Jan 22 15:22 System.map-3.19.0-49-generic
-rw------- 1 root root 3630758 Feb 26 23:32 System.map-3.19.0-51-generic
-rw------- 1 root root 6571600 Dec 31 17:40 vmlinuz-3.19.0-43-generic
-rw------- 1 root root 6573528 Jan 7 17:38 vmlinuz-3.19.0-43-generic.efi.signed
-rw------- 1 root root 6571600 Jan 18 18:05 vmlinuz-3.19.0-47-generic
-rw------- 1 root root 6573528 Jan 20 12:59 vmlinuz-3.19.0-47-generic.efi.signed
-rw------- 1 root root 6574032 Jan 22 15:22 vmlinuz-3.19.0-49-generic
-rw------- 1 root root 6575960 Feb 2 00:45 vmlinuz-3.19.0-49-generic.efi.signed
-rw------- 1 root root 6575024 Feb 26 23:32 vmlinuz-3.19.0-51-generic
-rw------- 1 root root 6576952 Feb 28 03:13 vmlinuz-3.19.0-51-generic.efi.signed
/boot$ dpkg -l | grep linux-image
rc linux-image-3.19.0-25-generic 3.19.0-25.26~14.04.1 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
rc linux-image-3.19.0-42-generic 3.19.0-42.48~14.04.1 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
ii linux-image-3.19.0-43-generic 3.19.0-43.49~14.04.1 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
ii linux-image-3.19.0-47-generic 3.19.0-47.53~14.04.1 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
ii linux-image-3.19.0-49-generic 3.19.0-49.55~14.04.1 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
ii linux-image-3.19.0-51-generic 3.19.0-51.58~14.04.1 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
rc linux-image-extra-3.19.0-25-generic 3.19.0-25.26~14.04.1 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
rc linux-image-extra-3.19.0-42-generic 3.19.0-42.48~14.04.1 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
ii linux-image-extra-3.19.0-43-generic 3.19.0-43.49~14.04.1 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
ii linux-image-extra-3.19.0-47-generic 3.19.0-47.53~14.04.1 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
ii linux-image-extra-3.19.0-49-generic 3.19.0-49.55~14.04.1 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
ii linux-image-extra-3.19.0-51-generic 3.19.0-51.58~14.04.1 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
ii linux-image-generic-lts-vivid 3.19.0.51.36 amd64 Generic Linux kernel image