Anjum Rashid bijoy26

SPF record check

Open the command line (Start > Run > cmd).
Enter nslookup -type=txt followed by a space and a domain or hostname, for example, nslookup -type=txt google.com.
If an SPF record exists, the result will be something like this: v=spf1 include:_spf.google.com ~all.
If there are no results or no v=spf1, then there is a problem getting the record for the domain, or it doesn’t exist.

DKIM record check

A guide to ANSI on Discord

Discord is now slowly rolling out the ability to send colored messages within code blocks. It uses the ANSI color codes, so if you've tried to print colored text in your terminal or console with Python or other languages then it will be easy for you.

Quick Explanation

To be able to send a colored text, you need to use the ansi language for your code block and provide a prefix of this format before writing your text:

\u001b[{format};{color}m

Enable Multiple SSH Keys for UNIX Based OS

Follow these steps below to enable multiple SSH keys on your device with UNIX Based OS (MacOS/ Ubuntu/ Debian etc.). Suppose, you have two different users/ accounts, one is personalAccount and another is companyAccount. And you have already a default key configured with personalAccount. (If you haven't set up your default ssh-key yet, please follow this article before going ahead with these steps described below.)

1. Generate another ssh-key

Generate a new ssh-key for your companyAccount.

cd ~/.ssh
ssh-keygen -t rsa -C "[email protected]"

A brief example on how to use npx to run gist based scripts.

Read the article here https://neutrondev.com/npm-vs-npx-whats-the-difference/ or watch it on YouTube https://www.youtube.com/watch?v=fSHWc8RTJug

Comparison of syntax extensions in Markdown flavors

I created a crude comparison of the syntax of the various common Markdown extensions to have a better view on what are the most common extensions and what is the most widely accepted syntax for them. The list of Markdown flavors that I looked at was based on the list found on CommonMark's GitHub Wiki.

Flavor	Superscript	Subscript	Deletion* Strikethrough	Insertion*	Highlight*	Footnote	Task list	Table	Abbr	Deflist	Smart typo	TOC	Math	Math Block	Mermaid
GFM

Google dork cheatsheet

Search filters

Filter	Description	Example
allintext	Searches for occurrences of all the keywords given.	`allintext:"keyword"`
intext	Searches for the occurrences of keywords all at once or one at a time.	`intext:"keyword"`
inurl	Searches for a URL matching one of the keywords.	`inurl:"keyword"`
allinurl	Searches for a URL matching all the keywords in the query.	`allinurl:"keyword"`
intitle	Searches for occurrences of keywords in title all or one.	`intitle:"keyword"`

	from datetime import datetime
	from dateutil import relativedelta

	# Assign your birth date and average life expectancy
	birth_date = input("Enter your birth date (YYYY-MM-DD): ")
	birth = datetime.strptime(birth_date, "%Y-%m-%d")
	avg_life = 72

	current = datetime.now()

	#!/usr/bin/env python3

	# deps: zbar-tools, oathtool
	#
	# call it as toptp-token.py <qrimage-filename>
	#
	# 1. decodes the qrcode image via zbar-img
	# 2. parses totp url and extracts parameters (secret, stepping, algo, ...)
	# 3. calls oathtool to generate the current token
	import subprocess

	#!/usr/bin/env python
	# -- coding:utf-8 --

	# Nginx - Remote Integer Overflow Vulnerability
	# CVE-2017-7529

	import sys
	import logging
	import argparse