Just wanted to update that as of docker.io 18.09.9+dfsg1-2 still having the problem. I completely removed docker with apt purge docker.io and rm -rf /etc/docker and reinstalled, but still get the error:
$ sudo apt install docker.io Reading package lists... Done Building dependency tree Reading state information... Done Suggested packages: docker-doc aufs-tools btrfs-progs rinse xfsprogs zfs-fuse | zfsutils The following NEW packages will be installed: docker.io 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/59.0 MB of archives. After this operation, 262 MB of additional disk space will be used. Selecting previously unselected package docker.io. (Reading database ... 480600 files and directories currently installed.) Preparing to unpack .../docker.io_18.09.9+dfsg1-2_amd64.deb ... Unpacking docker.io (18.09.9+dfsg1-2) ... Setting up docker.io (18.09.9+dfsg1-2) ... 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. ● docker.service - Docker Application Container Engine Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled) Active: activating (auto-restart) (Result: exit-code) since Fri 2019-09-20 10:31:13 MST; 22ms ago Docs: https://docs.docker.com Process: 22490 ExecStart=/usr/sbin/dockerd -H fd:// $DOCKER_OPTS (code=exited, status=1/FAILURE) Main PID: 22490 (code=exited, status=1/FAILURE) CPU: 208ms dpkg: error processing package docker.io (--configure): installed docker.io package post-installation script subprocess returned error exit status 1 Processing triggers for systemd (243~rc2-1) ... Processing triggers for man-db (2.8.7-3) ... Errors were encountered while processing: docker.io needrestart is being skipped since dpkg has failed E: Sub-process /usr/bin/dpkg returned an error code (1) $ sudo systemctl status docker ● docker.service - Docker Application Container Engine Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Fri 2019-09-20 10:31:18 MST; 1h 4min ago Docs: https://docs.docker.com Process: 23275 ExecStart=/usr/sbin/dockerd -H fd:// $DOCKER_OPTS (code=exited, status=1/FAILURE) Main PID: 23275 (code=exited, status=1/FAILURE) CPU: 162ms Sep 20 10:31:17 life systemd[1]: docker.service: Failed with result 'exit-code'. Sep 20 10:31:17 life systemd[1]: Failed to start Docker Application Container Engine. Sep 20 10:31:18 life systemd[1]: docker.service: Service RestartSec=100ms expired, scheduling restart. Sep 20 10:31:18 life systemd[1]: docker.service: Scheduled restart job, restart counter is at 4. Sep 20 10:31:18 life systemd[1]: Stopped Docker Application Container Engine. Sep 20 10:31:18 life systemd[1]: docker.service: Start request repeated too quickly. Sep 20 10:31:18 life systemd[1]: docker.service: Failed with result 'exit-code'. Sep 20 10:31:18 life systemd[1]: Failed to start Docker Application Container Engine.
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Description: application/pgp-keys
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Description: OpenPGP digital signature

