title: Dockerfile "rm -Rf" fail
body: <p>I have a very simple dockerfile, with "rm -Rf" to remove installation files after installation, but I got some error like: </p>
  
  <pre>
  Step 4/4 : RUN rm -Rf /INSTALLATION
   ---> Running in 19fe828f3c9d
  rm: cannot remove '/INSTALLATION/Subsystems/Common': Directory not empty
  rm: cannot remove '/INSTALLATION/Subsystems/EMS': Directory not empty
  </pre>
  
  <p>I run all with root user.</p>
  
  <p>My dockerfile:</p>
  
  <pre>
  FROM centos
  COPY INSTALLATION/ /INSTALLATION/ 
  RUN  rm -Rf /INSTALLATION
  </pre>
  
  <p>My OS is centos7, and host OS is RHLE 7.</p>
  
  <p>Docker info</p>
  
  <pre>
  [root@snap460c03 1]# docker info
  Containers: 53
   Running: 27
   Paused: 0
   Stopped: 26
  Images: 19
  Server Version: 1.13.0
  Storage Driver: overlay
   Backing Filesystem: xfs
   Supports d_type: false
  Logging Driver: json-file
  Cgroup Driver: cgroupfs
  Plugins: 
   Volume: local
   Network: bridge host macvlan null overlay
  Swarm: inactive
  Runtimes: runc
  Default Runtime: runc
  Init Binary: docker-init
  containerd version: 03e5862ec0d8d3b3f750e19fca3ee367e13c090e
  runc version: 2f7393a47307a16f8cee44a37b262e8b81021e3e
  init version: 949e6fa
  Security Options:
   seccomp
    Profile: default
  Kernel Version: 3.10.0-229.el7.x86_64
  Operating System: Red Hat Enterprise Linux Server 7.1 (Maipo)
  OSType: linux
  Architecture: x86_64
  CPUs: 24
  Total Memory: 94.41 GiB
  Name: snap460c03
  ID: T3ST:6DXJ:SDST:3W3J:Z4NB:UXF7:HGSZ:A3WH:ELHX:GVZW:APTD:7ZEK
  Docker Root Dir: /var/lib/docker
  Debug Mode (client): false
  Debug Mode (server): false
  Http Proxy: http://16.85.88.10:8080/
  No Proxy: docker-registry
  Registry: https://index.docker.io/v1/
  Experimental: false
  Insecure Registries:
   docker-registry:5000
   127.0.0.0/8
  Live Restore Enabled: false
  </pre>
  
  <p>I also tried new a container and try it manually, but the result is error too:</p>
  
  <pre>
  [root@devvm13 1]# docker run -it e20c9c5ffa8a /bin/bash
  
  [root@f3efa193700d /]# rm -Rf /INSTALLATION/Subsystems/Common/*
  
  [root@f3efa193700d /]# rm -Rf /INSTALLATION/Subsystems/Common 
  
  rm: cannot remove '/INSTALLATION/Subsystems/Common': Directory not empty
  
  </pre>
  
  <p>You can see the second rm is fail, I tried rmdir, the resule is error too.</p>
  
  <p>While I ls the directory, it show:</p>
  
  <pre>
  ls /INSTALLATION/Subsystems/Common
  ls: cannot access /INSTALLATION/Subsystems/Common/eium-license.config: No such file or directory
  ls: cannot access /INSTALLATION/Subsystems/Common/install_jdk.sh: No such file or directory
  eium-license.config  install_jdk.sh
  </pre>
  
  <p>You can it said no such file but follow with files.</p>