Shell Scripting Tutorial for Beginners 7 - How to append output to the e...

#! /bin/bash

echo -e "Enter the name of the file : \c"
read file_name

if [ -f $file_name ]
then
      if [ -w $file_name ]
      then
         echo "Type some text data. To quit press ctrl+d."
         cat >>  $file_name
      else
          echo "The file do not have write permissions"
      fi
 else   
  echo "$file_name not exists"
fi