title: awk's $1 conflicts with $1 in shell script
body: <p>I am writting a shell script which includes a couple of awk lines</p>
  
  <p>the awk line looks like:</p>
  
  <pre><code>cat input.csv | awk -F, '$1~/$1/ {print "is good"}'
  </code></pre>
  
  <p>the first <code>$1</code> is the first column of the input csv, the second <code>$1</code> is supposed to be the first command line input of this shell script</p>
  
  <p>I tried to put a <code>\</code> in front of the second <code>$</code>, but it seems to be not working. </p>
  
  <p>Can anyone help?</p>