title: Installed Go binary not found in path on Alpine Linux Docker
body: <p>I've got a Go binary I'm trying to run on the Alpine Docker image.</p>
  
  <p>This works fine for the Docker Go binary.</p>
  
  <pre><code>docker run -it alpine:3.3 sh
  apk add --no-cache curl
  
  DOCKER_BUCKET=get.docker.com
  DOCKER_VERSION=1.9.1
  curl -fSL "https://${DOCKER_BUCKET}/builds/Linux/x86_64/docker-$DOCKER_VERSION" -o /usr/local/bin/docker
  chmod +x /usr/local/bin/docker
  docker help
  Usage: docker [OPTIONS] COMMAND [arg...]
  ...
  </code></pre>
  
  <p>However, for the Go binary I want to install.</p>
  
  <pre><code>RACK_BUCKET=ec4a542dbf90c03b9f75-b342aba65414ad802720b41e8159cf45.ssl.cf5.rackcdn.com
  RACK_VERSION=1.1.0-beta1
  curl -fSL "https://${RACK_BUCKET}/${RACK_VERSION}/Linux/amd64/rack" -o /usr/local/bin/rack
  chmod +x /usr/local/bin/rack
  
  rack help
  sh: rack: not found
  
  /usr/local/bin/rack help
  sh: /usr/local/bin/rack: not found
  
  ls -al /usr/local/bin/
  total 43375
  drwxr-xr-x    2 root     root          1024 Jan 11 18:10 .
  drwxr-xr-x    8 root     root          1024 Jan 11 18:09 ..
  -rwxr-xr-x    1 root     root      30222575 Jan 11 18:09 docker
  -rwxr-xr-x    1 root     root      14190576 Jan 11 18:10 rack
  
  which rack
  /usr/local/bin/rack
  </code></pre>
  
  <p>I thought it might have something to do with <a href="https://stackoverflow.com/a/33240548/25991">this answer</a> but I don't get the same error when running <code>ldd</code>.</p>
  
  <pre><code>ldd /usr/local/bin/rack
      /lib64/ld-linux-x86-64.so.2 (0x7fdd15cd0000)
      libpthread.so.0 =&gt; /lib64/ld-linux-x86-64.so.2 (0x7fdd15cd0000)
      libc.so.6 =&gt; /lib64/ld-linux-x86-64.so.2 (0x7fdd15cd0000)
  </code></pre>
  
  <p>Any idea with this installed Go binary is not found in path on Alpine Linux Docker?</p>