package unattended-upgrades 0.90ubuntu0.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127

[pawan singh dhami]

package unattended-upgrades 0.90ubuntu0.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: unattended-upgrades 0.90ubuntu0.8
ProcVersionSignature: Ubuntu 4.10.0-35.39~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-35-generic x86_64
.var.log.unattended-upgrades.unattended-upgrades.log:

ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Sat Sep 30 10:12:12 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 127
InstallationDate: Installed on 2017-05-18 (134 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: unattended-upgrades
Title: package unattended-upgrades 0.90ubuntu0.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.apt.apt.conf.d.10periodic:
 APT::Periodic::Update-Package-Lists "1";
 APT::Periodic::Download-Upgradeable-Packages "0";
 APT::Periodic::AutocleanInterval "0";
 APT::Periodic::Unattended-Upgrade "0";
mtime.conffile..etc.apt.apt.conf.d.10periodic: 2017-06-16T13:22:47.273361

[Balint Reczey (rbalint)]

From DpkgTerminalLog.txt:
...
/usr/bin/ucf: line 567: awk: command not found
dpkg: error processing package unattended-upgrades (--configure):
 subprocess installed post-installation script returned error exit status 127

It looks like awk is missing from the system which either means that the filesystem is damaged or base-files is also missing which is an unsupported configuration.