Question

Hi, I need help for solving Linux question.

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1.Using the proper text editor, create a shell file called by (your name), your enrollment number, your program and the courses you study. Use the appropriate variables and display the above to the standard output (screen).

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2. Write A Shell Script to perform the following:

1. Display the files and directories
2. Print the date in 24 hour format
3. Display the System id
4. Display the current working directory
5. Print the status of process running on the system

3. Write a Shell script program on the manipulation of strings using different string techniques.

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4. Write a shell script to find the greatest and lowest of three numbers.

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5. Write a shell script program to display the number and name of each month from 1 - 12. (Use any construct)

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6. Write a shell script to add the numbers natural numbers from 0 – 10.

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7. Calculate odd and even numbers from 1 till 20, using shell scripting.

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8. Write the script to print the Sum and Reverse of the Given Number.

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9. How to read the arguments “Hi, my name is (your name)” passed to a shell script from the command line. Also, the script has to print the script name and the total number of arguments.

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10. Give the proper explanation/ examples / syntax / scripts to show the use of the following tools / utilities:

1. yum
2. rpm
3. du
4. fstab
5.   fsck
6. Mount/umount
7. Hostname

Answer 1

(4) Shell script to find the greatest and lowest of three numbers

echo "Enter three Integers:"

read a b c
#check whether "a" is greater than "b and c"
if [ $a -gt $b -a $a -gt $c ]

then
  
echo "$a is Greatest"

#check whether "b" is greater than "c and a"

elif [ $b -gt $c -a $b -gt $a ]

then
  
echo "$b is Greatest"

#above both eqations fails then "c" is greatest
else

echo "$c is Greatest!"

fi

#check whether "a" is less than "b and c"

if [ $a -lt $b -a $a -lt $c ]

then

echo "$a is Lowest"

#check whether "b" is less than "c and a"

elif [ $b -lt $c -a $b -lt $a ]

then

echo "$b is Lowest"

#above both eqations fails then "c" is lowest
else

echo "$c is Lowest!"

fi

(6) Shell script to add the numbers natural numbers from 0 – 10

# store single digit
i=1
# store number of digit
sum=0
# use while loop to caclulate the sum of all number
while [ $i -le 10 ]
do
sum=$(( $sum + $i )) # calculate sum of number
i=$(( $i + 1 ))
done
echo "Sum of Natural numbers is $sum"

(7) Using shell scripting Calculate odd and even numbers from 1 till 20

echo “First Odd and Even number till 20 are”
n=1
#use while loop checks "n" is less than 20
while [ $n -lt 20 ]
do
out=$(( $n % 2 ))
#check the number is EVEN or ODD
if [ $out -eq 0 ]
then
echo $n is even number
else
echo $n is ODD number
fi
#Loop continue upto 19
n=$(( $n + 1 ))
done

(8) Write the script to print the Sum and Reverse of the Given Number

echo "enter the no"

read n

s1=0

s2=0

#use while loop find out number is not equal to zero
while [ $n -ne 0 ]

do

#separte each digit and places it in "s1" to display REVERSE of number
t=`expr $n % 10`

s1=`expr $s1 \* 10`

s1=`expr $s1 + $t`
#separte each digit and places it in "s2" to display SUM of number
s2=`expr $s2 + $t`

n=`expr $n / 10`

done

echo "Sum of given number is $s2"
echo "Reverse of given number is $s1"