*** This bug is a duplicate of bug 1792500 ***
https://bugs.launchpad.net/bugs/1792500
This looks to be the issue (from DpkgTerminal.log)
Setting up docker.io (17.12.1-0ubuntu1) ...
addgroup: The group `docker' already exists and is not a system group. Exiting.
dpkg: error processing package docker.io (--configure):
installed docker.io package post-installation script subprocess returned
error exit status 1
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https://bugs.launchpad.net/bugs/1794217
Title:
package docker.io 17.12.1-0ubuntu1 failed to install/upgrade:
installed docker.io package post-installation script subprocess
returned error exit status 1
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