Restricting tab navigation to overlays(pop-ups)
About : We all have complex pages with several overlays that appear based on selections from several drop down menus and by on-click functionalitys,
Our goal is to limit the user to only be able to tab through the elements on the overlay (above positioned lightbox div) via the keyboard.
In ...read more
How to Port Knocking in Linux
To allow clients to ssh using port knocking
@server : 192.168.1.181
# download knockd rpm from web and install # rpm -ivh knockd-5.xx.rpm # rpm -qip knockd-5.xx.rpm - know about the packge # rpm -ql knockd - to list what are files have installed for knockd
First need to reject ...read more
Introduction to SASS
About sass : Sass is an extension of CSS that adds power and elegance to the basic language. It allows you to use variables, nested rules, mixins, inline imports, and more, all with a fully CSS-compatible syntax. Sass helps keep large stylesheets well-organized, and get small stylesheets up and running quickly ...read more
How to implement paypal payment gateway
The PayPal REST APIs are supported in two environments. Use the Sandbox environment for testing purposes, then move to the live environment for production processing.
The following endpoints address are two environments:
Sandbox (for testing) : https://api.sandbox.paypal.com Live (production) : https://api.paypal.com
A complete REST operation ...read more
Implementing Websocket Server Using Twisted.
Websocket, a technology to support modern web applications.read more
HOW TO BUILD LFS
First take one system of centos or ubuntu which ever you like. Make sure have the seperate partitions for LFS and swap which we are going to use fo LFS. Login to the system and create 2 partitions
For Exapmle: fdisk /dev/sda n enter +8G w # partprobe
Follow same ...read more