[Bug 1438788] [NEW] package mysql-server-5.6 5.6.23-1~exp1~ubuntu5 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1

[Argenis Bolivar]

Public bug reported:

The service not automatic start and try to remove

/usr/bin/deb-systemd-helper: error: unable to link
/etc/systemd/system/mysql.service to /dev/null: File exists

try to reinstall:

dpkg: error processing package mysql-server-5.6 (--configure):
 package mysql-server-5.6 is not ready for configuration
 cannot configure (current status `half-installed')
Errors were encountered while processing:
 mysql-server-5.6
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: mysql-server-5.6 5.6.23-1~exp1~ubuntu5
ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
Uname: Linux 3.19.0-10-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.17-0ubuntu1
AptOrdering:
 mysql-server-5.6: Purge
 NULL: �<��
Architecture: amd64
Date: Tue Mar 31 11:39:44 2015
DpkgTerminalLog:
 Removing mysql-server-5.6 (5.6.23-1~exp1~ubuntu5) ...
 update-alternatives: using /etc/mysql/my.cnf.fallback to provide /etc/mysql/my.cnf (my.cnf) in auto mode
 /usr/bin/deb-systemd-helper: error: unable to link /etc/systemd/system/mysql.service to /dev/null: File exists
 dpkg: error processing package mysql-server-5.6 (--purge):
  subprocess installed post-removal script returned error exit status 1
DuplicateSignature: package:mysql-server-5.6:5.6.23-1~exp1~ubuntu5:subprocess installed post-removal script returned error exit status 1
ErrorMessage: subprocess installed post-removal script returned error exit status 1
InstallationDate: Installed on 2015-03-05 (25 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150305)
RelatedPackageVersions:
 dpkg 1.17.24ubuntu1
 apt  1.0.9.7ubuntu3
SourcePackage: mysql-5.6
Title: package mysql-server-5.6 5.6.23-1~exp1~ubuntu5 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: mysql-5.6 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-package vivid

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https://bugs.launchpad.net/bugs/1438788

Title:
  package mysql-server-5.6 5.6.23-1~exp1~ubuntu5 failed to
  install/upgrade: subprocess installed post-removal script returned
  error exit status 1

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