Project all 10 case studies GS GOURAV_UPADHYAY

1 digital clock
echo "Digital Clock for Linux"
echo "To exit please press ctrl + c "

while :
do
    clear
    tput setaf 1             # Set text color to green
    tput cup 10 69           # Adjusted position for a larger display
    date +"%r"
    #tput sgr0                # Reset text attributes
    sleep 1
done









2

#!/bin/bash
# Function to display the sign-up form
display_form() {
    echo "Welcome to the Sign-Up Form"
    echo "---------------------------"
    read -p "Enter your username: " username
    read -sp "Enter your password (at least 8 characters): " password
    echo
    while [ ${#password} -lt 8 ]; do
        echo "Password must have at least 8 characters."
        read -sp "Enter your password (at least 8 characters): " password
        echo
    done
    read -p "Enter your email address: " email
    echo
    echo "Thank you for signing up, $username!"
    echo "Your email address is: $email"
}


# Main function
main() {
    display_form
}
# Calling the main function
Main











3
#!/bin/bash

# Initialize variables to store inventory and prices
declare -A inventory
declare -A prices


# Function to add items to inventory
add_item() {
    item_name=$1
    item_quantity=$2
    item_price=$3


    inventory["$item_name"]=$item_quantity
    prices["$item_name"]=$item_price
}


# Function to display available items and prices
display_inventory() {
    echo "Available Items in the Medical Store:"
    echo "-----------------------------------"
    for item in "${!inventory[@]}"; do
        echo "Item: $item - Quantity: ${inventory[$item]} - Price: ${prices[$item]}"
    done
}


# Function to sell items
sell_item() {
    item_name=$1
    item_quantity=$2


    current_quantity=${inventory["$item_name"]}
    if [ "$current_quantity" -lt "$item_quantity" ]; then
        echo "Sorry, only $current_quantity $item_name(s) available."
    else
        echo "Sold $item_quantity $item_name(s) for $((item_quantity * prices["$item_name"]))"
        inventory["$item_name"]=$((current_quantity - item_quantity))
    fi
}


# Main function
main() {
    add_item "Paracetamol" 50 5
    add_item "Bandages" 100 3
    add_item "Antiseptic" 30 7


    display_inventory


    echo "Welcome to the Mini Medical Store"
    echo "--------------------------------"
    read -p "Enter the item you want to purchase: " item_name
    read -p "Enter the quantity: " quantity


    sell_item "$item_name" "$quantity"


    display_inventory
}


# Calling the main function
main





4

#!/bin/bash


# Initialize associative arrays to store books and their availability
declare -A books
declare -A availability


# Function to add books to the library
add_book() {
    title=$1
    author=$2
    availability["$title"]="available"
    books["$title"]=$author
}


# Function to display available books
display_books() {
    echo "Available Books in the Library:"
    echo "--------------------------------"
    for title in "${!books[@]}"; do
        echo "Title: $title - Author: ${books[$title]} - Availability: ${availability[$title]}"
    done
}


# Function to borrow a book
borrow_book() {
    title=$1


    if [ "${availability[$title]}" = "available" ]; then
        availability["$title"]="borrowed"
        echo "You have borrowed the book: $title"
    else
        echo "Sorry, the book $title is currently not available."
    fi
}


# Function to return a book
return_book() {
    title=$1


    if [ "${availability[$title]}" = "borrowed" ]; then
        availability["$title"]="available"
        echo "You have returned the book: $title"
    else
        echo "This book is not borrowed or doesn't exist in the library."
    fi
}


# Main function
main() {
    add_book "1984" "George Orwell"
    add_book "To Kill a Mockingbird" "Harper Lee"
    add_book "The Great Gatsby" "F. Scott Fitzgerald"


    display_books


    echo "Welcome to the Mini Library Management System"
    echo "---------------------------------------------"
    echo "1. Borrow a Book"
    echo "2. Return a Book"
    echo "3. Exit"


    read -p "Enter your choice: " choice


    case $choice in
        1)
            read -p "Enter the title of the book you want to borrow: " title
            borrow_book "$title"
            ;;
        2)
            read -p "Enter the title of the book you want to return: " title
            return_book "$title"
            ;;
        3)
            echo "Exiting..."
            ;;
        *)
            echo "Invalid choice. Please enter a valid option."
            ;;
    esac


    display_books
}


# Calling the main function
main
















5

#!/bin/bash


# Initialize associative arrays to store menu items and their prices
declare -A menu
declare -A order


# Function to add menu items
add_item() {
    item_name=$1
    item_price=$2


    menu["$item_name"]=$item_price
}


# Function to display the menu
display_menu() {
    echo "Menu:"
    echo "-----"
    for item in "${!menu[@]}"; do
        echo "$item - ₹${menu[$item]}"
    done
}


# Function to take customer orders
take_order() {
    while true; do
        read -p "Enter the item you want to order (or type 'done' to finish): " item
        if [ "$item" == "done" ]; then
            break
        elif [ -z "${menu[$item]}" ]; then
            echo "Sorry, $item is not on the menu."
        else
            read -p "Enter the quantity: " quantity
            order["$item"]=$((order["$item"] + quantity))
        fi
    done
}


# Function to calculate and display the total bill
calculate_bill() {
    total=0
    echo "Order Summary:"
    echo "--------------"
    for item in "${!order[@]}"; do
        price=$((${menu[$item]} * ${order[$item]}))
        echo "$item x ${order[$item]} - ₹$price"
        total=$((total + price))
    done
    echo "Total: ₹$total"
}


# Main function
main() {
    add_item "Burger" 100
    add_item "Pizza" 150
    add_item "Salad" 80


    display_menu


    echo "Welcome to the Mini Restaurant Management System"
    echo "-----------------------------------------------"
    take_order


    calculate_bill
}


# Calling the main function
Main














6


#!/bin/bash

# Function to perform addition
add() {
    echo "$1 + $2" | bc
}


# Function to perform subtraction
subtract() {
    echo "$1 - $2" | bc
}


# Function to perform multiplication
multiply() {
    echo "$1 * $2" | bc
}


# Function to perform division
divide() {
    echo "scale=2; $1 / $2" | bc
}


# Main function
main() {
    echo "Simple Calculator"
    echo "-----------------"
    echo "1. Addition"
    echo "2. Subtraction"
    echo "3. Multiplication"
    echo "4. Division"
    read -p "Enter your choice: " choice


    case $choice in
        1)
            read -p "Enter first number: " num1
            read -p "Enter second number: " num2
            echo "Result: $(add $num1 $num2)"
            ;;
        2)
            read -p "Enter first number: " num1
            read -p "Enter second number: " num2
            echo "Result: $(subtract $num1 $num2)"
            ;;
        3)
            read -p "Enter first number: " num1
            read -p "Enter second number: " num2
            echo "Result: $(multiply $num1 $num2)"
            ;;
        4)
            read -p "Enter first number: " num1
            read -p "Enter second number: " num2
            if [ "$num2" -eq 0 ]; then
                echo "Error: Division by zero"
            else
                echo "Result: $(divide $num1 $num2)"
            fi
            ;;
        *)
            echo "Invalid choice"
            ;;
    esac
}


# Calling the main function
main









7

#!/bin/bash
# Function to generate a random password
generate_password() {
    local length=$1
    tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w "$length" | head -n 1
}


# Main function
main() {
    echo "Password Generator"
    echo "------------------"
    read -p "Enter the length of the password: " password_length
    generated_password=$(generate_password "$password_length")
    echo "Generated Password: $generated_password"
}


# Calling the main function
main









8

#!/bin/bash

# Define the filename for the database
DB_FILE="student_database.txt"


# Function to create a new database file
create_database() {
    touch "$DB_FILE"
    echo "Database created successfully."
}


# Function to view the contents of the database
view_database() {
    echo "Student Database:"
    echo "-----------------"
    cat "$DB_FILE"
}


# Function to insert a new student record
insert_record() {
    read -p "Enter student ID: " id
    read -p "Enter student name: " name
    read -p "Enter student age: " age
    echo "$id | $name | $age" >> "$DB_FILE"
    echo "Record inserted successfully."
}


# Function to update a student record
update_record() {
    read -p "Enter student ID to update: " id
    read -p "Enter new name: " new_name
    read -p "Enter new age: " new_age
    sed -i "s/^$id .*/$id | $new_name | $new_age/" "$DB_FILE"
    echo "Record updated successfully."
}


# Function to delete a student record
delete_record() {
    read -p "Enter student ID to delete: " id
    sed -i "/^$id/d" "$DB_FILE"
    echo "Record deleted successfully."
}


# Function to show a particular student record
show_record() {
    read -p "Enter student ID to view: " id
    grep "^$id" "$DB_FILE"
}


# Main function
main() {
    while true; do
        echo "Student Database Operations:"
        echo "1. Create Database"
        echo "2. View Database"
        echo "3. Insert Record"
        echo "4. Update Record"
        echo "5. Delete Record"
        echo "6. Show Record for Particular Student"
        echo "7. Exit"
        read -p "Enter your choice: " choice


        case $choice in
            1) create_database ;;
            2) view_database ;;
            3) insert_record ;;
            4) update_record ;;
            5) delete_record ;;
            6) show_record ;;
            7) echo "Exiting..." && exit ;;
            *) echo "Invalid choice. Please enter a valid option." ;;
        esac
    done
}


# Calling the main function
main




9

#!/bin/bash


# Define the directory where the files are located
DIRECTORY="/home/me/gourav_upadhyay/shell"


# Function to remove files older than 4 days based on their filenames
remove_old_files() {
    find "$DIRECTORY" -type f -name "*.*" -mtime +4 -exec rm {} \;
    echo "Old files older than 4 days have been removed from $DIRECTORY"
}


# Main function
main() {
    echo "Removing files older than 4 days in $DIRECTORY"
    remove_old_files
}


# Calling the main function
main




10

#!/bin/bash


# Function to count words, lines, and characters in a text file
count_stats() {
    file="$1"
    words=$(wc -w < "$file")
    lines=$(wc -l < "$file")
    characters=$(wc -m < "$file")
    echo "File: $file"
    echo "Words: $words"
    echo "Lines: $lines"
    echo "Characters: $characters"
    echo "---------------------"
}


# Main function
main() {
    echo "Counting statistics for the provided text files"
    echo "----------------------------------------------"
    file1="/home/me/gourav_upadhyay/shell/file1.sh"
    file2="/home/me/gourav_upadhyay/shell/file2.sh"
    count_stats "$file1"
    count_stats "$file2"
}


# Calling the main function
main