As a temporary measure, the installation failure error was avoided by putting 4.4.0-142 kernel on preseed.cfg
d-i base-installer/kernel/image string linux-image-4.4.0-142-generic After installing this version 4.04-142, we update the linux-base to 4.5ubuntu1 version at POST stage and upgrade it to 4.4.0-143. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1820755 Title: Netboot install fails due to linux-image-4.4.0-143-generic.postinst linux-update-symlinks not found To manage notifications about this bug go to: https://bugs.launchpad.net/bluelinux/+bug/1820755/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs