New Domain, New Blog, and welcome back google

Whoa Finally!!!

I bought a domain at the begging of the year, and well until right now I am using it :)

I return to google products, I am going to use blogspot and and google sites together. Why? Well I like google products and I never advanced with my html course. So I will use one that is done :p and google very useful :)

If you will like to follow my blog, go ahead :) :)

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Find which devices are connected to our network

Sometimes, we want to know how many devices are connected to our network. With any Unix OS you get easily know this. For this small tutorial we´re going to use Lubuntu 16.04. We will use nmap. Nmap (Network Mapper) is a security scanner. It is used to discover hosts and services on a computer network. For installing it, we first do sudo apt-get install nmap If we just need to identify the host names sudo nmap -sL 192.168.0.1/24 The result of this command will be Starting Nmap 7.01 ( https://nmap.org ) at 2016-10-02 12:39 CST Nmap scan report for 192.168.0.0 Nmap scan report for 192.168.0.1 Nmap scan report for 192.168.0.2 Nmap scan report for 192.168.0.3 Nmap scan report for 192.168.0.4 Nmap scan report for 192.168.0.5 If we need to know the OS of the devices we have connected we do a: sudo nmap -O 192.168.0.1/24 The address 192.188.0.1 depends of your network, you should do a ifconfig for knowing yours. The result of this command will be something like this:

How I miss you Synaptic!

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Access to AWS Postgres instance in private subnet

I have been working with AWS in the last days and encounter some issues when using RDS. Generally when you're working in development environment you have setup your database as Publicly accessible and this isn't an issue. But when you're working in Production. So we place the Amazon RDS database into a private subnet. What we need to do for connecting to the database using PgAdmin or other tool? We're going to use one of the most common methods for doing this. You will need to launch an Amazon EC2 instance in the public subnet and then use it as jumping box. So after you have your EC2, you will need to run the following command. See explantion below After this, you will need to configure your PgAdmin. The host name will be your localhost, the port is the same you define in the above command. Maintenance database will be your DB name and the username you have for connecting. Hope this helps you connect to your databases.

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