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dockerdockerfileechoubuntu-16.04

I get an error when running the Dockerfile

So I've built an image with docker build -t myimage2:1.0 .

This is my Dockerfile:

#getting base image
FROM ubuntu

MAINTAINER gilebrt <[email protected]>

RUN apt-get update

CMD ["echo", "Hello World"]

But when running docker run myimage2:1.0, I get the error below

/bin/sh: 1: [“echo”,”Hello: not found

I tried changing the CMD line, among other things to: CMD "echo hello World", but I still get the error:

/bin/sh: 1: echo hello World: not found

I am using Ubuntu 16.04.6 LTS
I am sure it's something silly, but I can't find the issue... Thanks in advance!

Solution

  • You should wrap "Hello World" with quotes, otherwise it will execute as echo Hello World, which is not valid, it should be echo "Hello World".

    #getting base image
FROM ubuntu

MAINTAINER gilebrt <[email protected]>

RUN apt-get update

CMD ["echo", "\"Hello World\""]