CLOUD COMPUTING-Lab 2 Bash Programming Soved

•     I think the Docker experiment starts to exhaust your strength and intellect on finding a good solution

•     Now you need to do more for your work

•     When you start coding, basically you are bashing • Perquisite: you installed VM with a Linux-kernel system • Help docs for bashing:

•     https://devhints.io/bash

•     https://linuxconfig.org/bash-scripting-tutorial-for-beginners

•     Our course has established a well-defined relationship with Baidu Inc. and Google Inc. For any of your questions, you can use their service to find out

Goal for Lab 2
•     Objectives:

•     To write shell scripts to solve problems

•     To implement some standard Linux-kernel utilities such as ls,cp,etc using system calls.

•     Understanding the idea of multi-programming (or multiplexing) and threading

•     Learn to read an English poem

•     Learn to read instructions, carefully

•     Write a decent report

Use Bash for Shell scripts
1.   Write a Shell script that accepts a filename, starting and ending line numbers as arguments and displays all the lines between the given line numbers.

2.   Write a Shell script that deletes all lines containing a specified word in one or more files supplied as arguments to it.

3.   Write a Shell script that displays list of all the files in the current directory to which the user has read, Write and execute permissions.

4.   Write a Shell script that receives any number of file names as arguments checks if every argument supplied is a file or a directory and reports accordingly. Whenever the argument is a file, the number of lines on it is also reported.

5.   Write a Shell script that accepts a list of file names as its arguments, counts and reports the occurrence of each word that is present in the first argument file on other argument files.

6.   Write a Shell script to list all of the directory files in a directory

7.   Write a Shell script to find factorial of a given integer.

File to use in your Test Linux Poem: The Reentrant Kernel
By Morgan Phillips

A reentrant function, if interrupted,

will return a result,

which is not perturbed.

int global_int;int is_not_reentrant(int x) { int x = x; return global_int + x; },

depends on a global variable,

which may change during execution.

int global_int;int is_reentrant(int x) { int saved = global_int; return saved + x; },

mitigates external dependency,

it is reentrant, though not thread safe.
Save the poem as your text file


Now to Show it Off
•     Instead of running basic bash coding solely, you need to exec it

•     You need to write a control script (i.e., script for script) that execute all your previous bash code one by one in a certain order

•     You need to append this piece of code to your report, as well as screen shot of running this code

•     HINTS: bash allows multiplexing in executing certain codes, the specific cmd to run it is hidden in this page.