package unity8-lxc (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 127

[Nur Sholihin]

when i installed it, it failed to load me to the desktop. and when i uninstalled it, i got this bugs.

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: unity8-lxc (not installed)
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
AptOrdering:
 unity8-lxc: Purge
 NULL: ConfigurePending
Architecture: amd64
Date: Sun Nov 15 23:00:28 2015
DpkgTerminalLog:
 Removing unity8-lxc (1.0.4+15.10.20150610-0ubuntu1) ...
 Purging configuration files for unity8-lxc (1.0.4+15.10.20150610-0ubuntu1) ...
 /var/lib/dpkg/info/unity8-lxc.postrm: 9: /var/lib/dpkg/info/unity8-lxc.postrm: lxc-destroy: not found
 dpkg: error processing package unity8-lxc (--purge):
  subprocess installed post-removal script returned error exit status 127
DuplicateSignature: package:unity8-lxc:(not installed):subprocess installed post-removal script returned error exit status 127
ErrorMessage: subprocess installed post-removal script returned error exit status 127
InstallationDate: Installed on 2014-01-24 (660 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5
 apt 1.0.10.2ubuntu1
SourcePackage: unity8-lxc
Title: package unity8-lxc (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 127
UpgradeStatus: Upgraded to wily on 2015-10-22 (23 days ago)

[Launchpad Janitor (janitor)]

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

[RoundDuckMan (roundduckman2)]

I found out if you remove the lxc folder, or probably at least unity8-lxc's folder, you can then correctly purge unity8-lxc. Hopefully a good workaround until this bug is patched...

[Christopher Townsend (townsend)]

Hi,

Thanks for entering this bug report. Looks like I didn't take into account that --purge will remove lxc/lxc1 first and remove lxc-destroy first before the unity8-lxc post-rm script is called which uses lxc-destroy.

Need to take care of this case.

[cosy (cosy2)]

for anyone reading this the lxc folder is on /var/lib and you need sudo so starting nautilus whit sudo will do the trick then go to /var/lib and remove the LXC folder

[Amr (amr-elghobary)]

This is was the ouput:
(Reading database ... 360310 files and directories currently installed.)
Removing unity8-lxc (1.0.5+16.04.20151027-0ubuntu1) ...
Purging configuration files for unity8-lxc (1.0.5+16.04.20151027-0ubuntu1) ...
lxc-destroy: parse.c: lxc_file_for_each_line: 57 Failed to parse config: lxc.include = /usr/share/unity8-lxc/unity8-lxc.conf
System error loading container
dpkg: error processing package unity8-lxc (--purge):
 subprocess installed post-removal script returned error exit status 1
Processing triggers for man-db (2.7.5-1) ...
Errors were encountered while processing:
 unity8-lxc
E: Sub-process /usr/bin/dpkg returned an error code (1)

[Mirosław Walczak (miras199002)]

sudo apt-get purge unity 8-lxc

Reading package lists ... Done
Building dependency tree
Reading state information ... Done
The following packages were automatically installed and are no longer required: bridge-utils cloud-image-utils debootstrap distro-info libaio1 libboost-random1.58.0 libiscsi2 liblxc1 libpam-cgfs librados2 librbd1 lxc-common lxc-templates lxc1 lxcfs python3-lxc qemu- block-extra qemu-utils uidmap
To remove them, use the "sudo apt autoremove."
The following packages will be REMOVED: unity8-lxc *
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation will be released 49.2 kB disk space.
Continue? [Y / n]
(Reading database ... 236079 files and directories currently installed.)
Removing package unity8-lxc (1.0.5 + 16.04.20151027-0ubuntu1) ...
Cleaning of configuration files package unity8-lxc (1.0.5 + 16.04.20151027-0ubuntu1) ...
lxc-destroy: parse.c: lxc_file_for_each_line: 57 Failed to parse config: lxc.include = /usr/share/unity8-lxc/unity8-lxc.conf
System error loading container
dpkg: error processing package unity8-lxc (purge): subprocess installed post-removal script returned error code 1
Processing triggers package man-db (2.7.5-1) ...
Errors were encountered while processing: unity8-lxc
E: Sub-process / usr / bin / dpkg returned an error code (1)

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity8-lxc - 1.0.5+16.04.20160407-0ubuntu1

---------------
unity8-lxc (1.0.5+16.04.20160407-0ubuntu1) xenial; urgency=medium

  [ Chris Townsend ]
  * Move the postrm script to prerm script as we need to use lxc-destroy
    before packages and files are purged. (LP: #1549105, #1516394)

 -- Christopher Townsend <email address hidden> Thu, 07 Apr 2016 14:36:00 +0000