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Angry IP Scanner is an open-source and cross-platform network scanner. It is very faster and simple to use platform which scans IP addresses and ports. TCP/IP(Angry IP) network scanner allows users to easily scan IP addresses within any range of your choice via a user-friendly interface. Once Angry IP Scanner detects an active IP address, then it resolves MAC address, hostname, and port/s. The gathered data information can be saved as TXT, CSV, XML or IP-Port list files. This article describes” How to install and use IP scanner in Linux”Installing Angry IP ScannerTo install Angry IP Scanner in Ubuntu/Linux Mint, ... Read More
Docker is an open-source project that automates the deployment of application inside the software container. The container allows the developer to package up all project resources such as libraries, dependencies, assets etc. Docker is written in Go Programming language and is developed by Dotcloud. It is basically a container engine which uses the Linux Kernel features like namespaces and control groups to create containers on top of an operating system and automates the application deployment on the container.Installing DockerBefore install Docker, it should required updated packages. To update the packages, use the following command –$ sudo apt-get updateUse the following ... Read More
In this article, we will learn how to setup and configure Ruby on Rails, which is the most popular stack application used by the developers which is generally used to create sites and web applications. The Ruby is a programming language where the programer’s use with the combination of Rails development frameworks to make the application development fast and simple.‘RVM’ (Ruby Version Manager) is the command-line tools used to install the Ruby and Rails which also provides a good environment for application development using Ruby on Rails can also provide multiple Ruby environments.PrerequisitesWe needed an Ubuntu 16.04 installed machine with ... Read More
In this article, we will learn how to setup and configure Ruby on Rails which is the most popular stack application used by the developers which is used to create sites and web applications. The Ruby is a programming language where the programer’s use with the combination of Rails development framework to make the application development fast and simple.‘rbenv’ is the command-line tools used to install the Ruby and Rails which also provides a good environment for application development using Ruby on Rails. ‘rbenv’ provides the application specific versions of Ruby.PrerequisitesWe needed an Ubuntu 16.04 installed machine with a non-root ... Read More
In this article we will learn about how to set up Postfix on Ubuntu 16.04, Postfix is a very popular open-source MTA (Mail Transfer Agent) which can be used to relay the emails on Ubuntu Linux systems, most of the public mail servers over the real world use the postfix only.PrerequisitesTo complete this demo we needed the followingA machine with Ubuntu 16.04 installed and a non-root user with sudo permissions on the machine.A (FQDN) fully Qualified Domain Name points to the machine.We assume the Domain FQDN mail.mydomain.comInstalling the PostfixAs Postfix is available with Ubuntu default repository we can directly go ... Read More
Shiny is an R package that allows Linux users to convert R code into an interactive webpage and documents online. You can take your shiny apps and share them in your organisation or the world. This article explains about how to set up shiny server on Ubuntu.Installing Shiny Server on UbuntuBefore installing Shiny server, we need to install the shiny R package. To install R packages, use the following command –$ sudo apt-get install r-baseThe sample output should be like this -Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are ... Read More
In this article, we will show you how to set up multiple SSL Certificates on a CentOS with Apache using a single IP address only. In general, a website administrator is restricted to use a single SSL Certificate per socket with an IP which will cost a lot of investment to the company. This restriction may lead them to buy multiple IP addresses for HTTP’s websites for their domain hosting or buy hardware that allows them to utilize multiple network adapters.This is allowed by an extension to the SSL protocol called Server Name Indication (SNI). Most current desktops and mobile ... Read More
In this article, we will learn about how to setup and configure the Apache Web server to restrict from visitors without authentication where we can hide some important and critical information to the un-authenticated users.PrerequisitesWe needed an Ubuntu machine with a non-root user with Sudo privileges.An Apache2 web server installed on the machine.Installing the Apache UtilitiesWe needed to install an Apache2 utility package called ‘htpasswd’ where this utility is a part of ‘apache2-utils’ packages.This will help us to create and manage the username and password which is needed to access the restricted part of the website.Below is the command to ... Read More
To match any single character in the given set with JavaScript RegExp, use the [aeiou] metacharacter.Example JavaScript Regular Expression var myStr = "Welcome to our website!"; var reg = /[we]/g; var match = myStr.match(reg); document.write(match);
To match any single character outside the given set with JavaScript RegExp, use the [^aeiou] metacharacter.Example JavaScript Regular Expression var myStr = "Welcome!"; var reg = /[^lc]/g; var match = myStr.match(reg); document.write(match);