Project 1- Shell Script For User Management And Back-up in Linux

🌀Task

-The script should be able to add, delete, and modify user accounts on a Linux system.

-Include options to create and manage groups for users.

-Implement a backup feature that compresses and archives a specified directory.

-The script should provide a user-friendly command-line interface with clear options and usage Instructions.

1. Script Overview: Let's start by understanding the purpose of our user_management.sh script. This script provides a command-line interface for performing various user management tasks:

• Creating a new user account

• Deleting an existing user account

• Modify an existing user accounts

• Creating a new Group

• Deleting an existing group

• Backup a specified directory

#!/bin/bash

# Function to display usage instructions
usage() {
    echo "Usage: $0 [OPTIONS]"
    echo "Options:"
    echo "  -a, --add-user USERNAME        Add a new user"
    echo "  -d, --delete-user USERNAME     Delete an existing user"
    echo "  -m, --modify-user USERNAME     Modify an existing user"
    echo "  -g, --add-group GROUPNAME      Add a new group"
    echo "  -r, --delete-group GROUPNAME   Delete an existing group"
    echo "  -b, --backup DIRECTORY         Backup a specified directory"
}

1. Provide an overview of the script's functionality:

   • Add User: Allow users to create new user accounts with custom parameters such as username, full name, home directory, and shell.

   • Delete User: Provide the ability to delete existing user accounts, including their home directories.

   • Modify User: Enable users to modify existing user accounts, including options to change full name, home directory, and shell.

    # Function to add a new user
    add_user() {
        username="$1"
        sudo useradd "$username"
        echo "User $username added successfully"
    }

    # Function to delete an existing user
    delete_user() {
        username="$1"
        sudo userdel -r "$username"
        echo "User $username deleted successfully"
    }

    # Function to modify an existing user
    modify_user() {
        username="$1"
        # Add modification logic here
        echo "User $username modified successfully"
    }

1. Provide an overview of the script's functionality

• Adding new groups with customizable attributes.

• Deleting existing groups to maintain system cleanliness.

    # Function to add a new group
    add_group() {
        groupname="$1"
        sudo groupadd "$groupname"
        echo "Group $groupname added successfully"
    }
  
    # Function to delete an existing group
    delete_group() {
        groupname="$1"
        sudo groupdel "$groupname"
        echo "Group $groupname deleted successfully"
    }
  

  1. Function to backup a specited dirrectory

• Creating a backup of critical system files and directories to facilitate system recovery in the event of data loss.

• Backing up user-generated data to prevent data loss and ensure business continuity.

• Automating regular backups to minimize the risk of data loss due to human error or system failures.

    # Function to backup a specified directory
    backup_directory() {
        directory="$1"
        backup_file="backup_$(date +'%Y%m%d_%H%M%S').tar.gz"
        tar -czf "$backup_file" "$directory"
        echo "Backup created: $backup_file"
    }
  

    # Main script logic
    while [[ $# -gt 0 ]]; do
        case "$1" in
            -a|--add-user)
                add_user "$2"
                shift 2 ;;
            -d|--delete-user)
                delete_user "$2"
                shift 2 ;;
            -m|--modify-user)
                modify_user "$2"
                shift 2 ;;
            -g|--add-group)
                add_group "$2"
                shift 2 ;;
            -r|--delete-group)
                delete_group "$2"
                shift 2 ;;
            -b|--backup)
                backup_directory "$2"
                shift 2 ;;
            -h|--help)
                usage
                exit ;;
            *)
                echo "Error: Invalid option: $1"
                usage
                exit 1 ;;
        esac
    done
  

  Conclusion:

  • Summarize the benefits of using the script to automate user account management, group management, and backup tasks on Linux systems.

  • Encourage readers to explore the script's capabilities and integrate it into their workflows for enhanced productivity and efficiency.