anchor.diff:  dockerfiles> cd ..
   instructor> docker ps
   CONTAINER ID        IMAGE                          COMMAND                CREATED              STATUS              PORTS                                                   NAMES
  -7b847ca4554e        registry:2.0                   "registry cmd/regist   45 seconds ago       Up 45 seconds       0.0.0.0:5000->5000/tcp                                  instructor_dockerregistry_1     
  -3704d3205eac        sameersbn/gitlab:7.10.4        "/app/init app:start   About a minute ago   Up About a minute   443/tcp, 0.0.0.0:10022->22/tcp, 0.0.0.0:10080->80/tcp   instructor_gitlab_1             
  -66ac375ecd8d        sameersbn/postgresql:9.4       "/start"               2 minutes ago        Up 2 minutes        5432/tcp                                                instructor_postgresqlgitlab_1   
  -b4a36e701386        sonatype/nexus:oss             "/bin/sh -c 'java      4 minutes ago        Up 4 minutes        0.0.0.0:8081->8081/tcp                                  instructor_nexus_1              
  -5986b380732c        sameersbn/redis:latest         "/start"               4 minutes ago        Up 4 minutes        6379/tcp                                                instructor_redisgitlab_1        
  -a041b58ceff1        instructor_httpserver:latest   "/run-apache.sh"       5 minutes ago        Up 5 minutes        0.0.0.0:8082->80/tcp                                    instructor_httpserver_1         
  +7b847ca4554e        registry:2.0                   "registry cmd/regist   45 seconds ago       Up 45 seconds       0.0.0.0:5000->5000/tcp                                  instructor_dockerregistry_1
  +3704d3205eac        sameersbn/gitlab:7.10.4        "/app/init app:start   About a minute ago   Up About a minute   443/tcp, 0.0.0.0:10022->22/tcp, 0.0.0.0:10080->80/tcp   instructor_gitlab_1
  +66ac375ecd8d        sameersbn/postgresql:9.4       "/start"               2 minutes ago        Up 2 minutes        5432/tcp                                                instructor_postgresqlgitlab_1
  +b4a36e701386        sonatype/nexus:oss             "/bin/sh -c 'java      4 minutes ago        Up 4 minutes        0.0.0.0:8081->8081/tcp                                  instructor_nexus_1
  +5986b380732c        sameersbn/redis:latest         "/start"               4 minutes ago        Up 4 minutes        6379/tcp                                                instructor_redisgitlab_1
  +a041b58ceff1        instructor_httpserver:latest   "/run-apache.sh"       5 minutes ago        Up 5 minutes        0.0.0.0:8082->80/tcp                                    instructor_httpserver_1
   ----
   
   Test if the servers are running:
  
positive.code: chmod +x /usr/local/bin/docker-compose
  ----
  
  Docker Compose is not natively supported on Windows and thus requires a workaround as specfied at https://registry.hub.docker.com/u/dduportal/docker-compose/.
  
  ## Install and Configure Docker Machine
  Install the Docker machine client for your environment: https://github.com/docker/machine/releases/[latest releases]
  
negative.code: '
  ----
  +
  Make sure to substitute `<HOST_IP>` with the IP address obtained earlier.
  +
  Leave other key/value in the file as is. Save and quit the editor.
  +
  