title: Check values in file is greater or equal in bash script
body: <p>I have file.txt include:</p>
  
  <p><code>2
  10
  60
  90</code></p>
  
  <p>now how can i check if numbers in that file is equal on greater than 50 end then do something. Something in my case is sending an email this part i have.
  I have tried do this with awk but it does not work in script.</p>