I had the same problem while upgrading from 15.04 to 15.10 today. I had 1 ppa installed on this system (ppa:ubuntu-lxc/stable) which I reverted before doing the upgrade using the ppa-purge tool. After purging this ppa from my system, I proceeded with the upgrade and it failed like this bug report mention.
As for the 2 commands they return both the same thing (note that I run these 2 commands after having done "sudo apt update; sudo apt upgrade" which seems to have fixed the lxc and lxc-template set up): $ sudo systemctl status lxc ● lxc.service - LXC Container Initialization and Autoboot Code Loaded: loaded (/lib/systemd/system/lxc.service; enabled; vendor preset: enabled) Active: active (exited) since Thu 2015-10-01 19:11:26 CEST; 2h 39min ago Main PID: 27092 (code=exited, status=0/SUCCESS) Oct 01 19:11:26 ubuntu systemd[1]: Starting LXC Container Initialization and Autoboot Code... Oct 01 19:11:26 ubuntu lxc-devsetup[27076]: /dev is devtmpfs Oct 01 19:11:26 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code. Oct 01 19:11:27 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code. $ sudo service lxc status ● lxc.service - LXC Container Initialization and Autoboot Code Loaded: loaded (/lib/systemd/system/lxc.service; enabled; vendor preset: enabled) Active: active (exited) since Thu 2015-10-01 19:11:26 CEST; 2h 40min ago Main PID: 27092 (code=exited, status=0/SUCCESS) Oct 01 19:11:26 ubuntu systemd[1]: Starting LXC Container Initialization and Autoboot Code... Oct 01 19:11:26 ubuntu lxc-devsetup[27076]: /dev is devtmpfs Oct 01 19:11:26 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code. Oct 01 19:11:27 ubuntu systemd[1]: Started LXC Container Initialization and Autoboot Code. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1490110 Title: package lxc 1.1.3-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 100 Status in lxc package in Ubuntu: Incomplete Bug description: Error during do-releas-update -d from 15.04 ProblemType: Package DistroRelease: Ubuntu 15.10 Package: lxc 1.1.3-0ubuntu1 ProcVersionSignature: Ubuntu 4.1.0-3.3-generic 4.1.3 Uname: Linux 4.1.0-3-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.18-0ubuntu7 Architecture: amd64 Date: Sat Aug 29 10:13:04 2015 DuplicateSignature: package:lxc:1.1.3-0ubuntu1:subprocess installed post-installation script returned error exit status 100 ErrorMessage: subprocess installed post-installation script returned error exit status 100 InstallationDate: Installed on 2015-08-13 (15 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) ProcCmdline: BOOT_IMAGE=/vmlinuz-4.1.0-3-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: lxc Title: package lxc 1.1.3-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 100 UpgradeStatus: Upgraded to wily on 2015-08-29 (0 days ago) defaults.conf: lxc.network.type = veth lxc.network.link = lxcbr0 lxc.network.flags = up lxc.network.hwaddr = 00:16:3e:xx:xx:xx To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1490110/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp