Shell Programming and Scripting

#!/bin/bash
filename = $2
if [ "$1" = "-cat" ]; then
echo " Displaying the Content of the file:"
filename = $2
cat filename
else
if [ "$1" = "-ls"]; then
echo "Displaying directory listing:"
ls -l filename
else
echo " Commands not correct:"
fi
done

#!/bin/bash
action="$1"
filename="$2"
#
case "${action}" in
        "-cat")
               echo "Displaying the Content of the file:"
               cat "${filename}"
               ;;
        "-ls")
               echo "Displaying directory listing:" 
               ls -l "${filename}"
               ;;
        *)
               echo "Commands not correct:"
               echo "Usage scriptname [-ls | -cat] filename"
               ;;
esac