Learning how to use Command Line Interface and Bash Scripting at AMMI-2021

scriptinng_solustions.sh

#!/bin/bash 

#Exercise on command line interface
echo "****Exercise on Comand Line Interface****"

#Navigating to directory
pwd #Check current directory
cd /Users/diyyah;ls #new directory and list command
cd AMMI;ls
cd BashScript;ls
cd Week-1-Bash-Script;ls
cd dataset;ls
#Question 8 : Write a command to display Partial content of the file "population.csv"
less **/population.csv
#Question 9 : Display first line:
head -1 **/population.csv

#Question 10 : Display first 10 lines 
head -10 **/population.csv

#Question 11 : Display population of comoros
grep 'Comoros' **/population.csv

#Quesiton 12 : Which country has population size of 2145194
grep '2145194' **/population.csv

#Question 13: Replace County with Country

sed -i 's/County/Country/g'  about.txt


#Exercise 2
echo "******Exercise 2*****"
echo "******This Exercise is all about learning how to comment *****"
: 'This is the scripting solutions to exercises on Bash Scripting.
Name: Amina Rufai
Email Address: [email protected]
Date of submission: Jan 24th, 2021
'
echo " " #Printing emptyline
#Exercise 1
echo "******Exercise 1*****"
echo "******This Exercise is just defining variables to be printed in the exercise 3*****"
first_name=Amina #This is my first name
last_name=Mardiyyah #this is my last name
sir_name=Rufai #this is my other name

#Exercise 3
echo "******Exercise 3*****"
full_name="$sir_name, $first_name $last_name"
#full_name='My full name is: ' #Writing a string to inform about my full name

echo "My full name is $full_name"
echo " " #Printng empty line
#Exercise 4
#bash script_solutions.sh - to run the file
echo "******Exercise 4*****"
echo "******This Exercise is Just Executing the Script in the terminal*****"

#Exercise 5
echo "******Exercise 5*****"
#Create an array Classmates
classmates=('Stephen' 'Mansour' 'Benjamin' 'Simon' 'Evan')
echo ${classmates[0]} #Printing first name of the student close to me
echo " " #Printing empting Line
echo ${classmates[*]} #Printing all the names of the students ib array-classmates
echo " " #Printing empting Line

#Exercise 6
#Creating an expression -results
echo "******Exercise 6******"

results=$(((4**15+3**6-15496)/(9*12**3-56))); 
echo $results
echo " " #Printing empting Line
#Exercise 7

echo "******Exercise 7*****"
#Write a conditional block to check if resutls evaluated in exercise 6 is a multiple of either of 3, 4 or 5
# Conditional Block
if [ $(( results % 4 )) -eq 0 ]; then
    echo "$results is a multiple of 4" #Condition for checking if its a multiple of 4
elif [ $(( results % 3 )) -eq 0 ]; then
    echo "$results is a multiple of 3" #Condition for checking if its a multiple of 3
elif [ $(( results % 5 )) -eq 0 ]; then
    echo "$results is a multiple of 5" #Condition for checking if its a mutiple of 5
else
    echo "$results is neither a multiple of 4,3,or 5"
fi

#End of condition block and exercise 7
echo " " #Printing empting Line


#Exercise 8
#Write a loop to evaluate 2**20
echo "******Exercise 8*****"
for (( i = 0; i <= 2 ; i++ ))
do
    echo $((i**20))
done 

#Exercise 9
echo "******Exercise 9*****"

function factorial() { 
   if (( $1 < 2 ))
   then
     echo 1
   else
     echo $(( $1 * $(factorial $(( $1 - 1 ))) ))
   fi
}
echo "The result for exercise 9"
factorial 4 #Testing the function