private String tailFile(File f) {
    try {
      return TailLogResponse.tailSystemLog(f);
    } catch (IOException ex) {
      return String.format("Could not tail %s because: %s",
          f, ex);
    }
  }
Returns the tail of the system log specified by <code>File</code>.
geode-core/src/main/java/org/apache/geode/admin/jmx/internal/AgentImpl.java