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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.
• 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.
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