mist@orange:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [836 B]
Get:2 Upgrade tool [1,265 kB]
Fetched 1,266 kB in 0s (0 B/s)
authenticate 'xenial.tar.gz' against 'xenial.tar.gz.gpg'
extracting 'xenial.tar.gz'
  Package linux-image-4.4.0-97-generic is not configured yet.
 linux-image-generic depends on linux-image-extra-4.4.0-97-generic; however:
  Package linux-image-extra-4.4.0-97-generic is not configured yet.

dpkg: error processing package linux-image-generic (--configure):
 dependency problems - leaving unconfigured
Setting up linux-firmware (1.157.12) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-108-generic
/usr/sbin/mkinitramfs: 66: .: Can't open /etc/initramfs-tools/initramfs.conf
update-initramfs: failed for /boot/initrd.img-3.13.0-108-generic with 2.
dpkg: error processing package linux-firmware (--configure):
 subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of linux-generic:
 linux-generic depends on linux-image-generic (= 4.4.0.97.102); however:
  Package linux-image-generic is not configured yet.

dpkg: error processing package linux-generic (--configure):
 dependency problems - leaving unconfigured
Processing triggers for initramfs-tools (0.122ubuntu8.9) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-108-generic
/usr/sbin/mkinitramfs: 66: .: Can't open /etc/initramfs-tools/initramfs.conf
update-initramfs: failed for /boot/initrd.img-3.13.0-108-generic with 2.
dpkg: error processing package initramfs-tools (--configure):
 subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
 linux-image-4.4.0-97-generic
 linux-image-extra-4.4.0-97-generic
 linux-image-generic
 linux-firmware
 linux-generic
 initramfs-tools

Upgrade complete

The upgrade has completed but there were errors during the upgrade
process.