# apt-get install lxc-docker
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  lxc-docker
0 upgraded, 1 newly installed, 0 to remove and 47 not upgraded.
Need to get 0 B/1,438 kB of archives.
After this operation, 5,832 kB of additional disk space will be used.
Selecting previously unselected package lxc-docker.
(Reading database ... 31119 files and directories currently installed.)
Unpacking lxc-docker (from .../lxc-docker_0.5.3-1_amd64.deb) ...
Processing triggers for ureadahead ...
Setting up lxc-docker (0.5.3-1) ...
start: Job is already running: docker
dpkg: error processing lxc-docker (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for ureadahead ...
Errors were encountered while processing:
 lxc-docker
E: Sub-process /usr/bin/dpkg returned an error code (1)