<p>I followed docker instructions to install and verify the docker installation (from <a href="http://docs.docker.com/linux/step_one/">http://docs.docker.com/linux/step_one/</a>).</p>

<p>I tried on 2 Ubuntu 14.04 machines and on both I got following error when starting docker daemon:</p>

<pre><code>$ sudo docker daemon
INFO[0000] Listening for HTTP on unix (/var/run/docker.sock) 
INFO[0000] [graphdriver] using prior storage driver "aufs" 
INFO[0000] Option DefaultDriver: bridge                 
INFO[0000] Option DefaultNetwork: bridge                
WARN[0000] Running modprobe bridge nf_nat br_netfilter failed with    message: modprobe: WARNING: Module br_netfilter not found. , error: exit status 1 
INFO[0000] Firewalld running: false                     
WARN[0000] Your kernel does not support cgroup memory limit: mountpoint for memory not found 
WARN[0000] mountpoint for cpu not found                 
FATA[0000] Error starting daemon: Devices cgroup isn't mounted 
</code></pre>

<p>I appreciate any help to resolve this issue.</p>

<p>I resolved this issue by starting the docker deamon manually using:</p>

<p><code>sudo service docker start</code></p>
