The script in the bash shell of Linux   Write a calculator script using if and elif statements called “calc-yourlastname.sh” that will add (add), subtract (sub), multiply (mul) and integer divide (div) two numbers. The script should take 3 arguments from the command line and produce the output.   The command line syntax is # ./scriptfile operation number1 number2. Integer division will yield only the quotient and no remainder.   You can use `expr expression` or $((expression)) to perform your math   For example, your results should appear like: [root@localhost chap7]# ./calc-smith.sh add  3 2 3 + 2 = 5

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.