title: Using grep command, I can print the data that match with my command but how to print an error when data is not available?
body: <p>I have device.json file available in my subdirectories and from that .json file, I am trying to print data = xxx value and I am using following Grep command but I also wanted to print an error when device.json file is not available in one of the subdirectory. </p>
  
  <p>find . -name "device.json" | xargs grep -E 'data'</p>