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Fotografia

Estoy llevando fotografía en la universidad. Aquí dejo el link donde pueden ver las fotos.
Link donde pueden ver todas las fotografias: https://sites.google.com/site/diegoturciostc/universidad/fotografia
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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:
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How I miss you Synaptic!

Several years  have passed since we saw the Synaptic included in Ubuntu. You can found reasons here  . So in a clear english the reason was to have a better add/remove program for users. A friendly application. The explanation sounds good, I didn't complain about that, until right now. Ubuntu has change a lot, it's really a friendly user OS. I have use CLI when necessary, but today I couldn't believe it. I'm a Google Chrome user, I know you will tell me it's not open source or I should use Chromium or FF. But no. I'm a user of Google Chrome, and many people also prefer Chrome over Chromium, so why it should be quite complex remove it? If Ubuntu wants to be more friendly user why you should use the terminal for removing one of the most popular web browsers? I could understand if is a browser few people use, a good reason. But not a popular browser, Chrome is one of the most popular browsers on the world! A screen shot of the Ubuntu Software Center, trying t
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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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