title: reading a particular line from a file in bash script using variable as line number
body: <p>I have a csv file which contains a large number of entries. I have to read certain lines from the file. The line number is stored in a variable called <em>lineno</em>.<br>
  How to accomplish this?It may look something like:</p>
  
  <pre><code>line=$(sed -n "($lineno)p")
  </code></pre>
  
  <p>I want to know the correct syntax to do this.<br>
  Thanks </p>