This mini project allows:

1️⃣ Add User
2️⃣ Delete User
3️⃣ Modify User
4️⃣ View User Info
5️⃣ List All Users
6️⃣ Exit

⚠️ Note: Must run as root user (use sudo ./script.sh)

Script: user_management.sh

#!/bin/bash

while true
do
    echo "------------------------------"
    echo "1. Add User"
    echo "2. Delete User"
    echo "3. Modify User"
    echo "4. View User Info"
    echo "5. List All Users"
    echo "6. Exit"
    echo "Enter your choice:"
    read choice

    case $choice in

    1)
        echo "Enter username to add:"
        read uname
        sudo useradd $uname
        if [ $? -eq 0 ]
        then
            echo "User added successfully."
            sudo passwd $uname
        else
            echo "Error adding user."
        fi
        ;;

    2)
        echo "Enter username to delete:"
        read uname
        sudo userdel -r $uname
        if [ $? -eq 0 ]
        then
            echo "User deleted successfully."
        else
            echo "Error deleting user."
        fi
        ;;

    3)
        echo "Enter username to modify:"
        read uname
        echo "Enter new home directory:"
        read home
        sudo usermod -d $home -m $uname
        echo "User modified successfully."
        ;;

    4)
        echo "Enter username to view info:"
        read uname
        id $uname
        ;;

    5)
        echo "System Users:"
        cut -d: -f1 /etc/passwd
        ;;

    6)
        echo "Exiting program..."
        break
        ;;

    *)
        echo "Invalid choice!"
        ;;

    esac
done

✅ How to Run

chmod +x user_management.sh
sudo ./user_management.sh

🎯 Important Commands (Viva)

• useradd → create user
• userdel -r → delete user with home directory
• usermod → modify user
• passwd → set password
• id → show user information
• /etc/passwd → contains user details

🔥 Example Output

1. Add User
2. Delete User
3. Modify User
4. View User Info
5. List All Users
6. Exit
Enter your choice: