0x01-shell_permissions

0x01. Shell, Permissions - DevOps Project

This project is part of the DevOps curriculum and focuses on gaining proficiency in working with shell basics and permissions in a Linux environment. The project consists of a series of tasks that cover various aspects of shell scripting, user permissions, and file ownership.

Learning Objectives

By completing this project, you will:

• Gain a deep understanding of Linux file permissions.
• Familiarize yourself with essential shell commands like chmod, sudo, and chown.
• Learn to represent and manipulate file permissions.
• Understand how to change file ownership and group.
• Master the execution of commands with root privileges.

Project Structure

The project contains a series of scripts, each addressing specific tasks related to shell basics and permissions. Here's a brief overview of the tasks:

0. My name is Betty

   • 0-iam_betty: Switch the current user to the user betty.

1. Who am I

   • 1-who_am_i: Print the effective username of the current user.

2. Groups

   • 2-groups: Print all the groups the current user is part of.

3. New owner

   • 3-new_owner: Change the owner of the file hello to the user betty.

4. Empty!

   • 4-empty: Create an empty file called hello.

5. Execute

   • 5-execute: Add execute permission to the owner of the file hello.

6. Multiple permissions

   • 6-multiple_permissions: Add execute permission to the owner and the group owner and read permission to other users to the file hello.

7. Everybody!

   • 7-everybody: Add execution permission to the owner, the group owner, and the other users to the file hello.

8. James Bond

   • 8-James_Bond: Set the permission to the file hello as follows: Owner: no permission at all, Group: no permission at all, Other users: all the permissions.

9. John Doe

   • 9-John_Doe: Set the mode of the file hello to this: -rwxr-x-wx 1 julien julien 23 Sep 20 14:25 hello.

10. Look in the mirror

    • 10-mirror_permissions: Set the mode of the file hello the same as olleh's mode.

11. Directories

    • 11-directories_permissions: Add execute permission to all subdirectories of the current directory for the owner, the group owner, and all other users.

12. More directories

    • 12-directory_permissions: Create a directory called my_dir with permissions 751 in the working directory.

13. Change group

    • 13-change_group: Change the group owner to school for the file hello.

14. Owner and group (Advanced)

    • 100-change_owner_and_group: Change the owner to vincent and the group owner to staff for all the files and directories in the working directory.

15. Symbolic links (Advanced)

    • 101-symbolic_link_permissions: Change the owner and the group owner of _hello to vincent and staff respectively.

16. If only (Advanced)

    • 102-if_only: Change the owner of the file hello to betty only if it is owned by the user guillaume.

17. Star Wars (Advanced)

    • 103-Star_Wars: Write a script that will play the Star Wars IV episode in the terminal.

Resources

Read or watch:

• Permissions

man or help:

chmod sudo su chown chgrp id groups whoami adduser useradd addgroup

For detailed instructions and examples, refer to the respective script files in this repository.

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Special Thanks for Project Guidance to

• Julien Barbier

YouTube | Twitter | LinkedIn

License

This project is licensed under the terms of the MIT License.

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