It appears to be mostly done installing where it gets stuck.
Preparing to unpack .../docker.io_1.10.3-0ubuntu6_amd64.deb ...
Unpacking docker.io (1.10.3-0ubuntu6) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for systemd (229-4ubuntu4) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up docker.io (1.10.3-0ubuntu6) ...
addgroup: The group `docker' already exists as a system group. Exiting.
$ sudo tree /var/lib/docker/
/var/lib/docker/
├── containers
├── devicemapper
│ ├── devicemapper
│ │ ├── data
│ │ └── metadata
│ └── metadata
└── tmp
It appears to be mostly done installing where it gets stuck.
Preparing to unpack .../docker. io_1.10. 3-0ubuntu6_ amd64.deb ...
Unpacking docker.io (1.10.3-0ubuntu6) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for systemd (229-4ubuntu4) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up docker.io (1.10.3-0ubuntu6) ...
addgroup: The group `docker' already exists as a system group. Exiting.
Progress: [ 66%] [###### ####### ####### ####### ####### ####### ####### ####### ####... ....... ....... ....... ....]