title: How to keep backslash when reading from a file?
body: <p>When I use "cat test.file", it will show</p>
  
  <pre><code>printf "This is a test log %d \n, testid";
   1
    2
  </code></pre>
  
  <p>When I use the bash file,</p>
  
  <pre><code>IFS=""
  while read data
  do
      echo "$data"
  done &lt;&lt; test.file
  </code></pre>
  
  <p>It will show</p>
  
  <pre><code>printf "This is a test log %d n, testid";
   1
    2
  </code></pre>
  
  <p>The "\" is gone.</p>
  
  <p>Is there any way that I can keep the "\" and space at the same time?</p>