docker 运行容器时提示 dockers exec user process caused "exec format error"

按照菜鸟教程的步骤，在linux（我用的是斐讯的一款路由，系统是 Debian GNU/Linux 9）中安装好docker后，按照教程操作：

1.  执行

docker run hello-world

能顺利执行，输出如下

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
590e13f69e4a: Pull complete
Digest: sha256:0e11c388b664df8a27a901dce21eb89f11d8292f7fca1b3e3c4321bf7897bffe
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (arm32v5)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

2. 执行

docker run ubuntu:15.10 /bin/echo "Hello world"

正常应该输出 Hello world，因为相当于在容器中执行 *echo "Hello world"*

但是我的环境中执行，输出

dockers exec user process caused "exec format error"

网上查了一圈，没有明确原因，有些讲到可能是镜像与系统不兼容

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解决：

最终在docker hub（https://hub.docker.com/）中选择合适的镜像，即可顺利运行。