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How to set up multiple Tor instances with Polipo in Windows

By Tan Nguyen | July 17, 2017 | Comments 0 Comment

Tor is free software and an open network that helps you defend against traffic analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security.

By default, Tor opens a SOCK proxy on port 9050 that allow internet traffic to go through to access Tor network.

In this post, we will show how to set up multiple Tor instances on the same Windows machine.

RabbitMQ installation guide on Linux Ubuntu 16.04

By Ngu Nguyen | July 17, 2017 | Comments 0 Comment

With more than 35,000 production deployments of RabbitMQ world-wide at small startups and large enterprises, RabbitMQ is the most popular open source message broker.

In this guide, we’ll cover how to install and configure a 3-node rabbitMQ cluster, with HA proxy and management plugin.

How to set up multiple Tor instances with Polipo on Linux

By Tan Nguyen | July 17, 2017 | Comments 0 Comment

By default, Tor opens a SOCK proxy on port 9050 that allow internet traffic to go through to access Tor network.

In this post, we will show how to set up multiple Tor instances on the same Linux machine.

How to monitor any command output in real-time with watch command on Linux

By Tan Nguyen | July 17, 2017 | Comments 0 Comment

On Linux, watch command helps you refresh the output of a command every second, which functions just like a real-time monitoring. Let’s look at some practical examples.

Top helpful Linux commands for beginners

By Tan Nguyen | July 17, 2017 | Comments 0 Comment

Keyboard shortcuts, monitor network, monitor disk usage, run tasks in background, download files, monitor cpu and ram usage, etc.

How to use nohup to execute commands in the background and keep it running after you exit from a shell promt

By Tan Nguyen | July 17, 2017 | Comments 0 Comment

Most of the time you login into remote server via ssh. If you start a shell script or command and you exit (abort remote connection), the process/command will get killed. Sometimes a job or a command takes a long time. If you are not sure when the job will finish, then it is better to leave job running in background. But, if you log out of the system, the job will be stopped and terminated by your shell. What do you do to keep job running in the background when process gets SIGHUP?

In this tutorial, we’ll talk about how to use nohup to execute commands in the background and keep it running after we exit from a shell promt.

Push notification for web browser

By Ngu Nguyen | July 17, 2017 | Comments 0 Comment

I. Introduction Have you ever seen your friend messages pop-ups on your desktop? Have you ever seen a amazon or lazada’s sale campaign information show up on your desktop even when you are not browsing those website? Those pop-ups are called push notification. Push notification is a message pop-ups on your client’s desktops / devices. …

Slowloris DoS Attack and Mitigation on NGINX Web Server

By Tan Nguyen | June 22, 2017 | Comments 0 Comment

Slowloris DoS Attack gives a hacker the power to take down a web server in less than 5 minutes by just using a moderate personal laptop. The whole idea behind this attack technique is making use of HTTP GET requests to occupy all available HTTP connections permitted on a web server.

Technically, NGINX is not affected by this attack. However in practice, the default configurations can make an NGINX web server “vulnerable” to Slowloris.

In this article, we are going to take a look at this attack technique and some way to mitigate this attack on NGINX.

Machine Learning – Basic Implementation (Part I – Linear Regression)

By Duy Truong | May 11, 2017 | Comments 0 Comment

Abstract This post is a series of how to do basic implement specific machine learning algorithm to solve a problem. This implementation will help you, step-by-step, tune plenty of processes, in order, to optimise model. Prerequisites You should have overview mathematical of linear regression and concept of terms: features, gradient descent, cost function … We …

How to Set Up a shared folder using Samba on Ubuntu with auto mount

By Tan Nguyen | May 11, 2017 | Comments 0 Comment

One of the most popular questions long-time Linux users have been asked is, “How do I create a network share that Windows can see?“

The best solution for sharing Linux folders across a network is a piece of software that’s about as old as Linux itself: Samba.

In this guide, we’ll cover how to configure Samba mounts on an Ubuntu 14.04 server.