package tar 1.28-2.1ubuntu0.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[hamza]

Issue is i mistakenly deleted dpkg folder so so many errors arises due to that.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: tar 1.28-2.1ubuntu0.1
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Tue Jan 17 21:05:48 2017
DuplicateSignature:
 package:tar:1.28-2.1ubuntu0.1
 Setting up tar (1.28-2.1ubuntu0.1) ...
 update-alternatives: error: cannot scan directory '/var/lib/dpkg/alternatives': No such file or directory
 dpkg: error processing package tar (--configure):
  subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2017-01-17 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: tar
Title: package tar 1.28-2.1ubuntu0.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)