title: kali linux terminal crontab file
body: <p>I do one <code>crontab</code> file </p>
  
  <p>with this code  </p>
  
  <pre><code>sum=0
  i="y"
  
  echo " Enter one no."
  read n1
  echo "Enter second no."
  read n2
  while [ $i = "y" ]
  do
  echo "1.Addition"
  echo "2.Subtraction"
  echo "3.Multiplication"
  echo "4.Division"
  echo "Enter your choice"
  read ch
  case $ch in
      1)sum=`expr $n1 + $n2`
       echo "Sum ="$sum;;
          2)sum=`expr $n1 - $n2`
       echo "Sub = "$sum;;
      3)sum=`expr $n1 \* $n2`
       echo "Mul = "$sum;;
      4)sum=`expr $n1 / $n2`
       echo "Div = "$sum;;
      *)echo "Invalid choice";;
  esac
  echo "Do u want to continue ?"
  read i
  if [ $i != "y" ]
  then
      exit
  fi
  done
  </code></pre>
  
  <p>How can I make the program to do every 10 minutes   ... 
  where can I put this command ?  <code>10 * * * *</code></p>
  
  <p>Then, I make another one vi file with the same code  can I make this file to crontab</p>