package:linux-image-4.4.0-87-generic:4.4.0-87.110
Setting up linux-image-4.4.0-87-generic (4.4.0-87.110) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
initrd.img(/boot/initrd.img-4.4.0-87-generic
) points to /boot/initrd.img-4.4.0-87-generic
 (/boot/initrd.img-4.4.0-87-generic) -- doing nothing at /var/lib/dpkg/info/linux-image-4.4.0-87-generic.postinst line 491.
vmlinuz(/boot/vmlinuz-4.4.0-87-generic
) points to /boot/vmlinuz-4.4.0-87-generic
 (/boot/vmlinuz-4.4.0-87-generic) -- doing nothing at /var/lib/dpkg/info/linux-image-4.4.0-87-generic.postinst line 491.
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-87-generic /boot/vmlinuz-4.4.0-87-generic
N: Ignoring file '50unattended-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension
N: Ignoring file '50unattended-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension
N: Ignoring file '50unattended-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-87-generic /boot/vmlinuz-4.4.0-87-generic
update-initramfs: Generating /boot/initrd.img-4.4.0-87-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 4.4.0-87-generic /boot/vmlinuz-4.4.0-87-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.4.0-87-generic /boot/vmlinuz-4.4.0-87-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.4.0-87-generic /boot/vmlinuz-4.4.0-87-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.4.0-87-generic /boot/vmlinuz-4.4.0-87-generic
Searching for GRUB installation directory ... found: /boot/grub
/etc/default/grub: line 20: ^G: command not found
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 127
Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-4.4.0-87-generic.postinst line 1052.
dpkg: error processing package linux-image-4.4.0-87-generic (--configure):
 subprocess installed post-installation script returned error exit status 2