Start-Date: 2016-06-28  06:33:35
Install: linux-headers-3.13.0-91:amd64 (3.13.0-91.138, automatic), linux-image-extra-3.13.0-91-generic:amd64 (3.13.0-91.138, automatic), linux-image-3.13.0-91-generic:amd64 (3.13.0-91.138, automatic), linux-headers-3.13.0-91-generic:amd64 (3.13.0-91.138, automatic)
Upgrade: linux-headers-generic:amd64 (3.13.0.88.94, 3.13.0.91.97), linux-libc-dev:amd64 (3.13.0-88.135, 3.13.0-91.138), linux-image-generic:amd64 (3.13.0.88.94, 3.13.0.91.97), linux-generic:amd64 (3.13.0.88.94, 3.13.0.91.97)
End-Date: 2016-06-28  06:37:08

root@hw04:~# ls -l /vmlinuz
lrwxrwxrwx 1 root root 30 Jun 28 04:48 /vmlinuz -> boot/vmlinuz-3.19.0-64-generic
root@hw04:~# ls -l /vmlinuz.old
lrwxrwxrwx 1 root root 29 Jun 27 14:13 /vmlinuz.old -> boot/vmlinuz-4.2.0-38-generic

sudo apt-get remove linux-image-generic linux-headers-generic

sudo apt-get install linux-generic-lts-wily