title: tar command not found in Dockerfile
body: <p>I am trying to download a file in rhel6 and use tar to uncompress it.
  I am running this on docker. I get a wierd error saying /bin/sh: tar: command not found.
  I am new to linux and docker. Can someone help.</p>
  
  <pre><code>#HELLO
  FROM rhel6
  MAINTAINER xxxxx
  
  #RUN yum -y install wget
  
  RUN yum update -y &amp;&amp; yum clean all
  
  #RUN yum -y install tar
  
  RUN curl -OL  http://username:pwd@downloads.datastax.com/enterprise/dse-4.0.3-bin.tar.gz
  
  RUN curl -OL  http://username:pwd@downloads.datastax.com/enterprise/opscenter-4.0.3.tar.gz
  
  RUN echo $PATH
  
  RUN tar -xzvf opscenter-4.0.3.tar.gz
  
  RUN rm *.tar.gz
  </code></pre>