@Test(timeout=120000)
public void testOsSecureRandomSetConf() throws IOException {

  Assume.assumeTrue(SystemUtils.IS_OS_LINUX);
  OsSecureRandom random = new OsSecureRandom();
  for(int n = 0; n < 10; ++n) {
    random.setConf(new Configuration());
    String[] scmd = new String[] {"/bin/sh", "-c", "lsof | wc -l"};
    ShellCommandExecutor sce = new ShellCommandExecutor(scmd);
    sce.execute(); 
    System.out.println("==lsof result " + n + ":");
    System.out.println(sce.getOutput());
  }
}