Write a Linux shell script to convert uppercase to lowercase letters for a given file, Unix program to convert uppercase to lowercase letters

Write a Linux shell script to convert uppercase to lowercase letters for a given file, Unix program to convert uppercase to lowercase letters


Program
clear


echo"Enter file name:"
read fn


a='tr'[A-Z]''[a-z]'<$fn'
echo$a


Output:
Enter File name: temp.sh
ALL THE CONTENT IS CONVERTED INTO CAPITAL LETTERS.
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