or example, assume that the name of your first script file is my$\_$first$\_$script.sh$,$ you will do the following two steps:

Step$1$: chmod $+$x my$\_$first$\_$script.sh

Step$2$: sh my$\_$first$\_$script.sh$.$

Below are the specifications of the three Linux scripts.

Script $1$: Environment Configuration plus File Management

Create a C$-$Shell script program that will read environment variable from a $$environment$.$cfg$$ which contains the values of three environment variables as shown below:

enVar$1$

enVar$2$

enVar$3$

In your script program, please do the following:

Put $$#$!/$bin$/$csh$$ in the first line $($interpreter line$)$ of the program.

Check to see if the environment.cfg file exists if it does not display an error to the user, and exit the program.

Create a loop to read from the environment.cfg$,$ and place each of the lines read into an array element.

Create a switch statement within the loop where each case will check what was read from the array in the respective iteration.

Within each case, set the environment variable based on the value in the array element that was read from the configuration file.

Once the loop has completed, create another loop to echo only the environment variable name, and display to the screen as well as displaying to an output file named $$outputFile$.$txt$.$

After the final loop has completed, exit the script.

Script $2$: Creating Functions

Create a BASH script program that will demonstrate creating functions in Linux programming. In your script program, please do the following:

Put $$#$!/$bin$/$bash$$ in the first line $($interpreter line$)$ of the program.

Define three integer variables named as FirstSum, SecondSum, and Product.

Create the first function named $$Sum$$ which will read in two arguments, add the values of two arguments, and then return the sum of these two arguments.

Create the second function named $$Multiplication$$ which will read in two arguments, then multiply the values of two arguments, and then return the product of these two arguments.

Call function Sum with two arguments as $100$ and $200,$ and assign the result to a variable named FirstSum.

Call function Sum with two arguments as $300$ and $400,$ and assign the result to a variable named SecondSum.

Call function Multiplication with the values of First Sum and SecondSum.

Exit.the script.

Script $3$: Application Process Control

Create a C$-$Shell script program that will demonstrate the use of using sequential, conditional, and iteration to control the application process control. In your script program, please do the following:

Put $$#$!/$bin$/$csh$$ in the first line $($interpreter line$)$ of the program

Declare an integer variable to hold user input.

To begin sequentially, output to the screen prompting the user to enter a number.

Accept the user input, and assign it to the integer variable that you declared.

Create an if condition statement checking the number that was input to see if it is less than $100.$

If the number is less than $100,$ output to the screen that the number is less than $100.$

If the number is equal to $100,$ output to the screen that the number is equal to $100.$

If the number is greater than $100,$ output to the screen that the number is greater than $100.$

Create a while loop to reduce the variable value that the user input to $0,$ and in each iteration output to the screen the value of the variable. Be creative and output anything else that you would like here. Once the while loop is complete and prior to the end of your program, output to the screen that the script has ended and goodbye.

Exit the script.