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question:Write a Perl script that processes a log file and counts the occurrences of different HTTP status codes. The script should accept the log file path as a command-line argument and print the results to the console in descending order of frequency.
answer:```perl #!/usr/bin/perl use strict; use warnings; # Check if a log file path is provided as command-line argument if (@ARGV != 1) { print "Usage: 0 <log_file_path>n"; exit(1); } my log_file = ARGV[0]; # Open the log file for reading open(my fh, '<', log_file) or die "Could not open file 'log_file' !"; my %status_codes; # Process each line in the log file while (my line = <fh>) { # Extract the HTTP status code from the log entry if (line =~ /HTTP/d+.d+" (d+)/) { my status_code = 1; status_codes{status_code}++; } } close(fh); # Sort and print the results foreach my code (sort { status_codes{b} <=> status_codes{a} } keys %status_codes) { printf "%s: %dn", code, status_codes{code}; } ``` To run this script, save it to a file named `count_http_status_codes.pl` and make sure it has executable permissions. Then, you can execute it with the following command: ``` ./count_http_status_codes.pl <path_to_log_file> ``` Replace `<path_to_log_file>` with the actual path of your log file. The script will then output the count of different HTTP status codes found in the log file, sorted by frequency in descending order.
question:What can be seen once in a minute, twice in a moment, and never in a thousand years?
answer:The letter 'M'.
question:Famous inventors and their inventions: Identify five well-known inventors and briefly describe one of their most significant inventions.
answer:1. Thomas Edison: One of his most significant inventions is the incandescent light bulb, which revolutionized indoor lighting and enabled people to work and socialize after dark more easily. The invention used a thin filament that glowed when heated by an electric current, producing visible light. 2. Alexander Graham Bell: He is best known for inventing the telephone, a device that transformed communication by allowing people to speak with each other over long distances. The telephone converts sound waves into electrical signals, which are then transmitted through wires and converted back into sound at the receiving end. 3. Nikola Tesla: Among his numerous inventions, one of the most significant is the development of alternating current (AC) electrical systems. AC power transmission allowed electricity to be generated at central power stations and distributed over long distances, making it more efficient and practical than direct current (DC) systems. 4. Marie Curie: She was a pioneering physicist and chemist who discovered two new elements, polonium and radium, and conducted groundbreaking research on radioactivity. Her work led to the development of X-ray technology and laid the foundation for modern nuclear science. 5. Tim Berners-Lee: He is credited with inventing the World Wide Web, a system that made the internet accessible and useful to millions of people around the world. By creating a way to link documents and resources across different computers using hypertext, Berners-Lee revolutionized how information is shared and accessed globally.
question:Generate a list of 12 words that start with 'qu'.
answer:1. Quail 2. Quarry 3. Quasar 4. Quench 5. Query 6. Quest 7. Queue 8. Quiche 9. Quick 10. Quilt 11. Quiver 12. Quota