Linux Training_Module 5 – Assignment

Module 5 - Assignment

Problem Statement: You work for xyz organization. Your organization uses a UNIX/Linux based server.

You have been asked to:

1. Create 2 shell script files — one.sh and two.sh
2. In one.sh, create a code which involves looping statements, Conditional statements and 3 functions
3. In two.sh, create a Case..esac statement in which first option runs the first function, 2nd option runs 2nd function and 3rd option runs the third function

1. Creating script one.sh containing a loop, a conditional statement, and three functions.

nano one.sh

The contents:

#!/bin/bash
 
# Function to greet
greet() {
  echo "Hello, $1"
}
 
# Function to calculate square of a number
square() {
  echo "Square of $1 is $(($1 * $1))"
}
 
# Function to check if a number is even or odd
check_even_odd() {
  if [ $(($1 % 2)) -eq 0 ]; then
    echo "$1 is even"
  else
    echo "$1 is odd"
  fi
}
 
# Loop to call functions
for i in 1 2 3; do
  if [ $i -eq 1 ]; then
    greet "User"
  elif [ $i -eq 2 ]; then
    square 4
  elif [ $i -eq 3 ]; then
    check_even_odd 5
  fi
done

Making script executable:

chmod +x one.sh

Testing one.sh

2. Creating script two.sh containing a case..esac statement to call the functions defined in one.sh.

nano two.sh

The contents:

#!/bin/bash
 
# Source the functions from one.sh
source ./one.sh
 
# Menu for case..esac
echo "Choose an option:"
echo "1. Greet User"
echo "2. Square a number"
echo "3. Check if a number is even or odd"
 
read choice
 
# Case..esac statement
case $choice in
  1)
    greet "User"
    ;;
  2)
    square 4
    ;;
  3)
    check_even_odd 5
    ;;
  *)
    echo "Invalid choice"
    ;;
esac

Making script executable:

chmod +x two.sh

Testing two.sh
Executing two.sh also executes one.sh that’s why we see its output at the beginning. Then we see the output of two.sh which prompts us to pick an option, I picked 2 which triggered function square