Can someone please explain to me ASAP??!!! ## Displaying Last n Lines of a File from the Command Line### IntroductionUnix-based operating systems usually include a tool named `tail`. This tool displays the last 10 lines of a file whose name is provided as a command line argument.### Task OverviewWrite a program that provides the same behavior as `tail`, but with an added functionality: the user can specify how many lines to print from the terminal. The program should also display an appropriate error message if the file requested by the user does not exist or if the command line argument is omitted.### ObjectiveTo display the last n lines of a file whose name is provided as a command line argument.### Instructions- The program should accept a file name and the number of lines to display as inputs.- Implement error handling to manage cases where: - The file does not exist. - No command line argument is provided. ### NoteYou may need to pass a file as an argument when running the program. Make sure to have access to a sample file, the contents of which you want to print out.**Example Code Structure:**```pythonimport sysdef tail(filename, n=10): try: with open(filename, 'r') as file: lines = file.readlines() if len(lines) <= n: print(''.join(lines)) else: print(''.join(lines[-n:])) except FileNotFoundError: print(f"Error: The file '{filename}' does not exist.") except IndexError: print("Error: Please provide the filename as a command line argument.")if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python tail.py FILENAME [N]") else: filename = sys.argv[1] n = int(sys.argv[2]) if len(sys.argv) > 2 else 10 tail(filename, n)```This example demonstrates handling command line arguments in Python. Modify the approach based on the programming language you use. The error handling ensures that the user receives appropriate feedback in case of missing or incorrect inputs.

1. Check if the command line argument for the file name is provided. If not, display an error…

Unix-based operating systems usually include a tool named tail. It displays the last 10 lines of a file whose name is provided as a command line argument. Write a program that provides the same behavior i.e. the user can specify how many lines to print from the terminal. Display an appropriate error message if the file requested by the user does not exist, or if the command line argument is omitted. Objective: To display the last n lines of a file whose name is provided as a command line argument. Note: You may need to pass a file as an argument, so make sure to have access to a sample file, the contents of which you want to print out.

Unix-based operating systems usually include a tool named tail. It displays the last 10 lines of a file whose name is provided as a command line argument. Write a program that provides the same behavior i.e. the user can specify how many lines to print from the terminal. Display an appropriate error message if the file requested by the user does not exist, or if the command line argument is omitted. Objective: To display the last n lines of a file whose name is provided as a command line argument. Note: You may need to pass a file as an argument, so make sure to have access to a sample file, the contents of which you want to print out.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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