SHELL SCRIPT TO CONCATENATE TWO STRINGS AND DISPLAY LENGHT OF NEW STRING.

Here is a simple interactive shell script to display concatenation of two strings entered by the user and display  the length the        resultant string.

Vim Script_Name.sh
:i
#!bin/bash
echo -n "Enter the file path : "
#Display user the message to enter file path.
read file_path
#Input the path.
echo "The fourth and fifth line of file are as follows:"
     
cat $file_path | head -5 | tail -2
#Display fourth and fifth line.
:wq

The above script can be executed directly as follows:
# bash Script_Name.sh
  OR
#  sh Script_Name.sh

The script can also be executed  by giving execute permission as follows:
# chmod +x Script_Name
# ./Script_Name