Question

• Linux
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• Write a bash shell script that does the following:
  • Print out a friendly welcome message
  • Ask the user for the name of their favorite animal
  • Grep that animal from a text file noises.txt
  • Tell the user what that animal says (i.e. what noise does it make)
  • If the animal does not exist ask the user what noise the animal makes
  • Store that new information in noises.txt

Answer 1

Please find the requested script below. Also including the screenshot of sample output .

Please provide your feedback
Thanks and Happy learning!

#!/bin/bash
#Above line sets the environment for the script to bash

echo "************** Welcome to the animal sound finder **************"
echo
echo "Enter the name of your favorite animal : "
read animal
if [ ! -z "$animal" -a "$animal" != " " ]
then
    #Check whether the file exists or not
    if [ -f ./noises.txt ]
    then
        grepResult=`grep -i "$animal" ./noises.txt | head -1`
        if [ ! -z "$grepResult" -a "$grepResult" != " " ]
        then
            animalSound=`echo $grepResult | cut -d: -f 2`
        else
            echo "Please enter the sound that $animal makes: "
            read animalSound;
            echo "$animal:$animalSound" >> ./noises.txt
        fi
        echo "$animal makes $animalSound sound."
    else
        echo "Please enter the sound that $animal makes: "
        read animalSound;
        echo "$animal:$animalSound" >> ./noises.txt
        echo "$animal makes $animalSound sound."
    fi
else
    echo "Sorry, You have entered an invalid animal name!"
fi