ComputeServiceContext computeContext = new ComputeServiceContextFactory().createContext(
            config.getProvider(),
            config.getAccount(),
            config.getKey(),
            ImmutableSet.of(
                  new Log4JLoggingModule(),
                  new JschSshClientModule()));

      ComputeService computeService = computeContext.getComputeService();

      Map<? extends NodeMetadata, ExecResponse> responses = computeService.runScriptOnNodesMatching(
            NodePredicates.withTag(config.getTag()),
            Payloads.newStringPayload(createScript()),
            RunScriptOptions.Builder.runAsRoot(true));

      for(Map.Entry<? extends NodeMetadata, ExecResponse> response : responses.entrySet())
      {
         System.out.println(response.getKey().getId() + " " +  response.getKey().getName() + " " + response.getKey().getTag());
         System.out.println(response.getValue().getExitCode());
         System.out.println(response.getValue().getError());
         System.out.println(response.getValue().getOutput());
      }
   }

   private String createScript()
   {
      return Statements.newStatementList(
               Statements.createFile(
                 "root.was.here",
                     ImmutableList.of(
                        "root.was.here"
              )),
              Statements.exec("apt get foo"),
              Statements.exec("apt install foo")
       ).render(OsFamily.UNIX);

   }

'
   /**
    * build a shell script that invokes the contents of the http request in bash.
    *
    * @return a shell script that will invoke the http request
    */
   public static String buildCurluntar(String destination, HttpRequest request) {
      String headers = Joiner.on(' ').join(
               Iterables.transform(request.getHeaders().entries(), new Function<Entry<String, String>, String>() {

                  @Override
                  public String apply(Entry<String, String> from) {
                     return String.format("-H \"%s: %s\"", from.getKey(), from.getValue());
                  }

               }));
      return String.format("mkdir -p "+ destination+ ";cd "+ destination+ ";curl -s --retry 20 %s %s |tar -xzf -\n", headers, request.getEndpoint().toASCIIString());
   }