Completed day3 Submission

Challenges/Day_3/user_management.sh

@@ -0,0 +1,97 @@
+#!/bin/bash
+
+# Function to display usage information
+display_usage() {
+    echo "Usage: user_management.sh [options]"
+    echo "Options:"
+    echo "  -c, --create  : Create a new user account"
+    echo "  -d, --delete  : Delete an existing user account"
+    echo "  -r, --reset   : Reset the password of an existing user account"
+    echo "  -l, --list    : List all user accounts"
+    echo "  -h, --help    : Display this help message"
+}
+
+# Function to check if a username exists
+is_username_exist() {
+    local username="$1"
+    id "$username" &>/dev/null
+}
+
+# Function to create a new user account
+create_user_account() {
+    read -p "Enter the new username: " new_username
+
+    if is_username_exist "$new_username"; then
+        echo "Username already exists. Please choose a different username."
+        exit 1
+    fi
+
+    read -sp "Enter the password: " new_password
+    echo
+
+    sudo useradd -m "$new_username"
+    echo "$new_username:$new_password" | sudo chpasswd
+    echo "New user account '$new_username' created successfully."
+}
+
+# Function to delete an existing user account
+delete_user_account() {
+    read -p "Enter the username to be deleted: " del_username
+
+    if ! is_username_exist "$del_username"; then
+        echo "User account '$del_username' does not exist."
+        exit 1
+    fi
+
+    sudo userdel -r "$del_username"
+    echo "User account '$del_username' deleted successfully."
+}
+
+# Function to reset the password of an existing user account
+reset_user_password() {
+    read -p "Enter the username for password reset: " reset_username
+
+    if ! is_username_exist "$reset_username"; then
+        echo "User account '$reset_username' does not exist."
+        exit 1
+    fi
+
+    read -sp "Enter the new password: " new_password
+    echo
+
+    echo "$reset_username:$new_password" | sudo chpasswd
+    echo "Password for user account '$reset_username' reset successfully."
+}
+
+# Function to list all user accounts
+list_user_accounts() {
+    echo "List of User Accounts:"
+    echo "====================="
+    awk -F: '{print "Username:", $1, "\tUID:", $3}' /etc/passwd
+}
+
+# Main script logic
+case "$1" in
+    -c|--create)
+        create_user_account
+        ;;
+    -d|--delete)
+        delete_user_account
+        ;;
+    -r|--reset)
+        reset_user_password
+        ;;
+    -l|--list)
+        list_user_accounts
+        ;;
+    -h|--help)
+        display_usage
+        ;;
+    *)
+        echo "Invalid option. Use -h or --help for usage information."
+        exit 1
+        ;;
+esac
+
+exit 0
+