docs: protected String getBashVersionInfo() {
          String versionInfo = "";
          try {
              String result[] = ExecUtil.execute("bash --version");
              for(String line : result) {
                  if(!line.isEmpty()) {
                      versionInfo = line; // return only first output line of version info
                      break;
                  }
              }
          }
          catch (IOException|InterruptedException ioe) { ioe.printStackTrace(); }
          return versionInfo;
      }