bashscripts

Task 1:

Bash scripts for Systems Administration

Reynerio Samos

Assignment Set Given : SEPT 26, 2024

Ones to be checked will be: 4, 5, 6, 10

1. The simplest Hello World shell script

   echo Command

   hello_world.sh

2. [] Summation of two integers

   if block

   sum_int.sh

3. [] Summation of two real numbers

   bc (basic calculator) command

   sum_real.sh

4. Script to find out the biggest number in 3 numbers

   if -elif block

   biggest.sh

5. Operation (summation, substraction, multiplication and division) of two numbers

   switch

   operation.sh

6. Script to reverse a given number

   while block

   reverse.sh

7. [] A more complicated greeting shell script

   no stated method

   greeting.sh

8. [] Sort the given five numbers in ascending order (using array)

   do loop

   sort_asc.sh

9. [] Calculating average of given numbers on command line arguments

   do loop

   avg.sh

10. Calculating factorial of a given number

    while block

    factorial.sh

11. [] An application in research computing

    combining all above

    research.sh

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Task 2:

Create a shell script that takes in three integers. The script is to calculate the product and sum of the integers and also arrange them in ascending order

threenums.sh

Task 3:

Create a shell script that request a string of text and a number. The script should print the string of text the given number of times only when the number is between 5 and 20; otherwise it should display an appropriate message.

printstring.sh

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Task 4:

1. Write a shell script that accomplishes the following tasks:

   a.) Accept a file name from the command line that represents a text file that contains first and last names. And accepts a second command line argument that contains the last name that the user wants to find.

   b.) Your script should use a regular expression to get all the names(lines) in the file that have the requested last name.

Example run: Assume names.txt is found and it contians the following names below. (add at least 6 more names to the file)

Jane Smith
Hope Peters
Peter Smith
Pam Peters

$ my-lookup names.txt Peters
Hope Peters
Pam Peters

Goodbye!