package initramfs-tools 0.125ubuntu9 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127

[alan winn]

occurred after first boot and update

ProblemType: Package
DistroRelease: Ubuntu 17.04
Package: initramfs-tools 0.125ubuntu9
ProcVersionSignature: Ubuntu 4.10.0-21.23-generic 4.10.11
Uname: Linux 4.10.0-21-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.1
Architecture: amd64
Date: Fri May 26 21:21:07 2017
DuplicateSignature:
 package:initramfs-tools:0.125ubuntu9
 Processing triggers for initramfs-tools (0.125ubuntu9) ...
 /var/lib/dpkg/info/initramfs-tools.postinst: 19: /var/lib/dpkg/info/initramfs-tools.postinst: update-initramfs: not found
 dpkg: error processing package initramfs-tools (--configure):
  subprocess installed post-installation script returned error exit status 127
ErrorMessage: subprocess installed post-installation script returned error exit status 127
InstallationDate: Installed on 2017-05-26 (0 days ago)
InstallationMedia: Systemback Live (ulinux17) - Release amd64
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.10ubuntu2
 apt 1.4
SourcePackage: initramfs-tools
Title: package initramfs-tools 0.125ubuntu9 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[dino99 (9d9)]

That version is now dead
http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml