title: Docker & nginx operation not permitted
body: <p>I'm trying to run Nginx on an Arch Linux server using Docker. I've created the container:</p>
  
  <pre><code>[root@tronagon atc]# docker images
  REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
  nginx               latest              5328fdfe9b8e        5 days ago          133.9 MB
  [root@tronagon atc]# docker ps
  CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
  [root@tronagon atc]# docker create nginx
  9842dcf58c17504c3723a6c0c0648e43c17e771d2b3fe315bde2e4979536fd09
  </code></pre>
  
  <p>However when I attempt to start it I  get a <code>System error: operation not permitted</code> error:</p>
  
  <pre><code>[root@tronagon atc]# docker start 984
  Error response from daemon: Cannot start container 984: [8] System error: operation not permitted
  Error: failed to start containers: [984]
  </code></pre>
  
  <p>The docker daemon is definitely running: </p>
  
  <pre><code>[root@tronagon atc]# systemctl status docker
  * docker.service - Docker Application Container Engine
     Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
     Active: active (running) since Tue 2015-12-22 10:05:23 UTC; 1h 8min ago
       Docs: https://docs.docker.com
   Main PID: 908 (docker)
     CGroup: /system.slice/docker.service
             `-908 /usr/bin/docker daemon -H fd:// --exec-opt native.cgroupdriver=cgroupfs
  </code></pre>
  
  <p>In fact, I cannot run any containers:</p>
  
  <pre><code>[root@tronagon atc]# docker run -it ubuntu /bin/bash
  Unable to find image 'ubuntu:latest' locally
  latest: Pulling from library/ubuntu
  0bf056161913: Pull complete 
  1796d1c62d0c: Pull complete 
  e24428725dd6: Pull complete 
  89d5d8e8bafb: Pull complete 
  Digest: sha256:a2b67b6107aa640044c25a03b9e06e2a2d48c95be6ac17fb1a387e75eebafd7c
  Status: Downloaded newer image for ubuntu:latest
  exec format error
  Error response from daemon: Cannot start container 224bef93152b5537c8650258172c43226243859b7047657ef488f23e195ad051: [8] System error: exec format error
  </code></pre>
  
  <p>Any ideas?</p>