Error docker.io install.

nvidia@tegra-ubuntu:~$ sudo apt-get install docker.io
Reading package lists… Done
Building dependency tree
Reading state information… Done
docker.io is already the newest version (1.12.6-0ubuntu1~16.04.1).
0 upgraded, 0 newly installed, 0 to remove and 216 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up docker.io (1.12.6-0ubuntu1~16.04.1) …
addgroup: The group `docker’ already exists as a system group. Exiting.
Job for docker.service failed because the control process exited with error code. See “systemctl status docker.service” and “journalctl -xe” for details.
invoke-rc.d: initscript docker, action “start” failed.
dpkg: error processing package docker.io (–configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
docker.io
E: Sub-process /usr/bin/dpkg returned an error code (1)

Hi,

Please check this topic:
https://devtalk.nvidia.com/default/topic/1000224/jetson-tx2/docker-on-the-tx2/

Thanks.