I have completed the task.

Challenges/Day_1/Day1_solution.sh

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+#!/bin/bash
+
+## Task 1: Comments
+
+# This is a bash script to automate the deployment process.
+
+## Task 2: Echo
+
+# Display a welcome message
+echo "Welcome! This is Day 1 of the Bash Script Challenge initiated by Shubham Londhe Sir..."
+
+## Task 3: Variables
+
+# Declare and assign a variable
+Var1="Gopal"
+
+# Print the result
+echo "Hi, My Name Is $Var1"
+
+## Task 4: Using Variables
+
+# Read input from the user
+read -p "Enter the first number: " num1
+read -p "Enter the second number: " num2
+
+# Calculate the sum of the two numbers
+sum=$((num1 + num2))
+
+# Print the result
+echo "The sum of $num1 and $num2 is: $sum"
+
+## Task 5: Using Built-in Variables
+
+# Get the current date and time
+current_date_time=$(date)
+
+# Get the username of the current user
+current_user=$(whoami)
+
+# Get the hostname of the system
+hostname=$(hostname)
+
+# Display the information
+echo "Current date and time: $current_date_time"
+echo "Current user: $current_user"
+echo "Hostname: $hostname"
+
+## Task 6: Wildcards
+
+# Specify the directory path
+directory="/home/gopal/Pictures/BashBlaze-7-Days-of-Bash-Scripting-Challenge"
+
+# Specify the file extension you want to search for
+extension=".txt"
+
+# Use the wildcard * to match files with the specified extension in the directory
+files_with_extension=$(ls "$directory"/*"$extension")
+
+# Check if any files with the specified extension were found
+if [ -z "$files_with_extension" ]; then
+    echo "No files with the extension $extension found in the directory $directory."
+else
+    echo "Files with the extension $extension in the directory $directory:"
+    echo "$files_with_extension"
+fi
+

Challenges/Day_2/day_2.0_explorer_solution.sh

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+#!/bin/bash
+
+# Display welcome message and list files and directories in the current path
+echo "Welcome to the File and Directory Explorer!"
+# List files and directories in the current path with their sizes in human-readable format
+ls -lh | awk '{print $9 "\t" $5}'
+while true; do
+
+    #Prompt the user to enter a line of text
+    read -p "Enter a line of text (Press Enter to exit): " input
+
+    #Read user's input until an empty string is entered
+    if [ -z "$input" ]; then
+        echo "Exiting the File and Directory Explorer. Goodbye!"
+        exit 0
+    fi
+
+    #Count the number of characters in the entered line of text
+    char_count=$(echo -n "$input" | wc -m)
+    echo "Character count: $char_count"
+done

Challenges/Day_2/day_2.1_Dir_Back_Rot_solution.sh

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+#!/bin/bash
+
+# Function to create backup with timestamped folder
+create_backup() {
+    local source_dir=$1
+    local source_dir="${source_dir}"
+    local backup_dir="backup_$(date +'%Y-%m-%d_%H-%M-%S')"
+    mkdir "$source_dir/$backup_dir"
+    echo "path: $source_dir/$backup_dir/$backup_dir" 
+    cp -r "${source_dir}"/* "$backup_dir"
+    rm -r $source_dir/$backup_dir/$backup_dir
+    echo "Backup created: $backup_dir"
+}
+
+# Function to rotate backups and keep only the last 3 backups
+rotate_backups() {
+    local source_dir=$1
+    local backup_dirs=($(ls -d "${source_dir}"/backup_* | sort))
+
+    local backup_count=${#backup_dirs[@]}
+    if [ "$backup_count" -gt 3 ]; then
+        local backups_to_remove=$((backup_count - 3))
+
+        for ((i=0; i<"$backups_to_remove"; i++)); do
+            rm -rf "${backup_dirs[$i]}"
+            echo "Backup removed: ${backup_dirs[$i]}"
+        done
+    fi
+}
+
+# Check if a directory path is provided as a command-line argument
+if [ $# -eq 0 ]; then
+    echo "Error: Directory path not provided."
+    echo "Usage: $0 <directory_path>"
+    exit 1
+fi
+
+# Check if the provided directory exists
+source_dir=$1
+if [ ! -d "$source_dir" ]; then
+    echo "Error: Directory '$source_dir' does not exist."
+    exit 1
+fi
+
+# Create three backups with timestamped folders
+for ((i=0; i<3; i++)); do
+    create_backup "$source_dir"
+done
+
+# Rotate backups and keep only the last 3 backups
+rotate_backups "$source_dir"
+
+
+