List comprehensions provide us with a simple way to create a list based on some iterable. During the creation, elements from the iterable can be conditionally included in the new list and transformed as needed.
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OCSP Stapling on Nginx and Apache webserver
Have you error 'ssl_stapling_init_cert: Can't retrieve issuer certificate!' in your apache log file? Or error 'OCSP_basic_verify() failed (SSL: error:27069065:OCSP routines:OCSP_basic_verify:certificate verify error:Verify error:unable to get local issuer certificate) while requesting certificate status' in your nginx error file? Probably you have a misconfigured web server for OCSP STAPLING support
How to Change Hostname on Debian Linux
This tutorial explains how to change the hostname on Debian 10 Buster without restarting the system.
Python Sorting Libraries and Algorithms Benchmark/Comparison
Python, Numpy, Pandas, PyTorch, TensorFlow & SQL sorting libraries and algorithms comparison
Top 5 sorting algorithms with Python code
How work bubble sort, insertion sort, selection sort, merge sort and quick sort and what of them is best.
Epson printer error - An ink pad needs Service
Are you owner epson printer and have you error message 'An ink pad needs Service, contact Epson' on your printer display?
JavaScript Tricks You Won’t Find in Most Tutorials
Useful tips for writing more concise and performant JavaScript
SSH - Too Many Authentication Failures
When I try connect to my ssh server, I started seeing this error recently: Received disconnect from a.b.c.d port 22:2: Too many authentication failures for
How manage log files with LOGROTATE
Understanding logrotate utility, How does logrotate know if should rotate log files or not and How debug Logrotate utility.
Python DocStrings, Annotations and PEP8
Guide how to write perfect Python DocStrings, how write annotations and what is PEP8
Explanation DMARC (Domain-based Message Authentication, Reporting and Conformance) in all details
Domain-based Message Authentication, Reporting, and Conformance, or DMARC, is a technical standard that helps protect email senders and recipients from spam, spoofing, and phishing.
Explanation SPF (Sender Policy Framework) in all details
Sender Policy Framework (SPF) is an email authentication method designed to detect forged sender addresses in emails (email spoofing), a technique often used in phishing and email spam. SPF allows the receiver to check that an email claiming to come from a specific domain comes from an IP address authorized by that domain's administrators. The list of authorized sending hosts and IP addresses for a domain is published in the DNS records for that domain. SPF together with DKIM are based stones to DMARC