Can't install docker-engine on Ubuntu 14.04 LTS

apt install docker-engine

# apt-get install -f docker-engine
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 docker-engine : Depends: init-system-helpers (>= 1.18~) but 1.14 is to be installed
                 Depends: lsb-base (>= 4.1+Debian11ubuntu7) but 4.1+Debian11ubuntu6 is to be installed
                 Depends: libdevmapper1.02.1 (>= 2:1.02.99) but 2:1.02.77-6ubuntu2 is to be installed
                 Recommends: aufs-tools but it is not going to be installed
                 Recommends: cgroupfs-mount but it is not installable or
                             cgroup-lite but it is not going to be installed
                 Recommends: git
E: Unable to correct problems, you have held broken packages.

I have been following this guid: https://docs.docker.com/installation/ubuntulinux/
And have the same result :/

@ifduyue @poliveira89 Make sure you only add one entry in Step 6 of "Update your apt sources".

@ctate Thank you.

@poliveira89 @ctate @wangshuwei5 End up using "deb https://get.docker.com/ubuntu docker main" instead, according to https://docs.docker.com/linux/step_one/

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