You need to have 4.5ubuntu1~16.04.1 installed or you get the error
/var/lib/dpkg/info/linux-image-4.15.0-20-generic.postinst: 50: /var/lib/dpkg/info/linux-image-4.15.0-20-generic.postinst: linux-update-symlinks: not found
A manual install with sudo apt install linux-image-4.15.0-20-generic might also have issues as the linux-modules-extra-4.15.0-20-generic will not be installed as a dependency in 16.04
linux-modules-extra is a dependency of linux-image-generic-hwe-16.04-edge
Check in terminal
apt policy linux-base
You need to have 4.5ubuntu1~16.04.1 installed or you get the error
/var/lib/ dpkg/info/ linux-image- 4.15.0- 20-generic. postinst: 50: /var/lib/ dpkg/info/ linux-image- 4.15.0- 20-generic. postinst: linux-update- symlinks: not found
A manual install with sudo apt install linux-image- 4.15.0- 20-generic might also have issues as the linux-modules- extra-4. 15.0-20- generic will not be installed as a dependency in 16.04 generic- hwe-16. 04-edge
linux-modules-extra is a dependency of linux-image-