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 linux-modules-extra is a dependency of linux-image-generic-hwe-16.04-edge -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1770053 Title: package linux-image-4.15.0-20-generic 4.15.0-20.21~16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-edge/+bug/1770053/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
