Creating Users and Groups on Linux with a Bash Script

Overview

This bash script automates the process of creating multiple users and groups on a Linux system. It's designed to streamline the onboarding process for new employees or system users. The script reads user information from an input file, creates users with their respective groups, sets random passwords, and logs all actions.

Features

Creates users and their personal groups
Adds users to additional specified groups
Generates random passwords for each user
Logs all actions for auditing purposes
Stores generated passwords securely
Handles existing users and groups
Provides detailed error checking and reporting

Prerequisites

Linux environment (tested on Ubuntu)
Root or sudo access
Bash shell

Installation

Clone this repository https://github.com/Seundavid18/HNG11-Stage-1-Task or download the create_users.sh script.
Make the script executable:

   chmod +x create_users.sh

Usage

Create an input file (e.g., users.txt) with the following format:

   username; group1,group2,group3

Each line represents a user. The username and groups are separated by a semicolon (;). Multiple groups are separated by commas (,).

Run the script with root privileges:

   sudo ./create_users.sh users.txt

Replace users.txt with the path to your input file.

Input File sample

light; sudo,dev,www-data
idimma; sudo
mayowa; dev,www-data

Each line represents a user
Username and groups are separated by a semicolon (;)
Multiple groups are separated by commas (,)
Whitespace around separators is ignored

Output

Users are created with their home directories
Each user is assigned to their specified groups
Random passwords are generated for each user
All actions are logged in /var/log/user_management.log
Passwords are stored in /var/secure/user_passwords.csv

Troubleshooting

Ensure you have root privileges when running the script
Check the log file at /var/log/user_management.log for detailed information about each action and any errors
Verify that the input file is formatted correctly

Conclusion

By automating user and group management with a Bash script, you can efficiently handle multiple users, ensure security through proper permissions and password management, and maintain an audit log of all actions. This script provides a solid foundation for user management in a Linux environment.