Quagga tutorial

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On the web page of quagga you'll find a method called Quagga. I entered in the script tags this code :. But nothing happened. What do I need to do to get this webcam working?

Any other opinions to create a web-based application for scanning barcodes? It's a few months old question but Eugene's answer is not full. For me, to make QuaggaJS work I had to add video tag as well:. You should also know that you can get a free SSL certificat, but you need to have access to your server. Most hosting services can help you with this. Then include the target in your input stream like this: target: document.

Learn more. Asked 5 years ago. Active 1 year ago. Viewed 9k times. I need to get the webcam working for searching barcodes and imported quagga. I entered in the script tags this code : Quagga. Ready to start" ; Quagga. Thank you for answering!

QUAGGA

Active Oldest Votes. Eugene Eugene 96 3 3 bronze badges. Raff W Raff W 2 2 silver badges 9 9 bronze badges. Have you checked your console? Add a div element like this in your markup: Then include the target in your input stream like this: target: document.

Ready to start' ; Quagga. How about the select Barcode Type from Dropdownlist? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Featured on Meta. Feedback on Q2 Community Roadmap.In this quick tutorial you'll learn how to draw a Quagga in 9 easy steps - great for kids and novice artists.

The images above represents how your finished drawing is going to look and the steps involved. Below are the individual steps - you can click on each one for a High Resolution printable PDF version. Make sure you also check out any of the hundreds of drawing tutorials grouped by category. They were a subspecies animals that are the same, but a little different, and live in different places of Zebras.

The Qaugga lived in South Africa and were known to be a very energetic animal. The reason they are extinct is because explorers would kill them for food and tribes often used the unique skin as money. Quaggas had stripes in their front like a zebra, but towards their back legs a Quagga looked more like a horse. Lesson Plan Note: Quaggas are great addition to a cultural study of Africa. This topic can be part of a study of Africa and its countries. This idea would work for any age group.

Next post: How to Draw a Red Kite. Previous post: How to Draw a Ptarmigan. All Animals All Categories. Ocean Animals. Zoo Animals. Rainforest Animals. Cartoon Characters. Polar Bear. How to Draw a Quagga. Print Tutorial. Farm Animals.This means that in order to follow this tutorial you will need the following on your machine.

quagga tutorial

I have a very basic and by basic I mean default install, no services at all Ubuntu installation in my VirtualBox environment. I use this to help clone Ubuntu setups. This VirtualBox VM is setup so by default it has access to the internet through the single network interface. The first step is to clone this server in VirtualBox - copying the images.

This is done by selecting the Ubuntu Base image, right clicking on the entry and selecting clone. On the first page you need to define the name of the VirtualBox server this is important, so hold onto that information for later :. The next step is to halt the quagga server, and then change the network configuration.

If you right click on the server, select Settings and go to Network you will see that Adapter1 is enabled, and attached to NAT. Before we move on, we need to detach the first adapter as by unchecking the Enable Network Adapter box Alternatively, you can set this to Generic Driver if you want, but GNS3 will do that for you anyway in the next stage.

Finally, we need to add the server to GNS3. However, this typically adds the VM with a single interface - you need multiple interfaces for the lab set so select the VM, then click Edit and on the Network screen, increase the number of Adapters to 4. Before we go on, the next step is to layout the topology for this lab. In the diagram above, the Quagga router is the Grey router. R1, R2 and R3 are all Cisco routers. IP Allocations are as follows:. The routes in AS can all be summarised under The routes with AS will be advertised to the Quagga router, which will then redistribute those routes into the IGP to deliver full connectivity.

Quagga is not a single server on a Linux box, but actually consists of several seperate daemons, each running a particular routing protocol. By default, none of the daemons are configured to run so the first thing we need to do is turn on the specific daemons we require. If this has all been done correctly, it should then be possible to connect and manage the quagga instances using vtysh. However, there is one last niggle. For some reason, the vtysh interface defaults to using less as its pager of choice.

You will find it annoying hitting q all the time so I suggest changing the pager to use more. You can do this from the command line by executing the following:.This is a small setup instruction for BGP peering test, followed by a small group of test scenarios.

I did a lot of job interviews this year. Some for QA, some for Network Administrator, etc. Lately, for a job interview, I was asked to do some routing configuration. As a home-work. For this I used Zebra. Zebra was discontinued inbut a brave group of open source enthusiast grabbed the idea and continued working. Since then the product grew into a better routing software supporting even more protocols. They called it Quagga.

The list of supported protocols now goes as:.

quagga tutorial

So this is a small tutorial, how to set a BGP session between 2 virtual devices running Quagga. For this tutorial, I avoided my preferred distribution, because It is a bit more complicated there. You can access their CLI like this:. You can enter this configuration via CLI command line interface or just write it in the files zebra. So, there goes… First, we need a VirtualBox installation get it from here.

How to build a network of Linux routers using quagga

Leave as is. Install Ubuntu into the box. Start Gnome Terminal and execute the following:. BGP diagram skeleton. Zebra configuration saved from vty! Zebra configuration saved from vty. BGP Diagram, detailed. PING Password: SomeSmallFile. Password :. BGP keepalives in Wireshark. Kernel IP routing table. This website uses cookies to improve your experience.The zebra daemon is a abstraction layer between the kernel and the running routing processes. Each routing protocol has its own specific daemon.

Quagga installed on a physical host acts as a dedicated router. Quagga updates the kernel routing table. It modifies interface IP addressing, sets static routes and enables dynamic routing.

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Quagga can modify, add and change the physical host interface configuration and routing table, without the need user having privileged root access to a dedicated machine. Following section describes a very basic configuration example, how to configure a additional IP address Show basic mode commands, use the? After choosing initial entry command showcontinue using? The help function is setup like a tree, where using the?

Compare output shown below to the Linux ip routeshows exactly the same IP routing table:. The privileged mode is used to add, change, modify interface IP settings. To get into privileged mode use enablethe default password zebra :. Verify IP configuration using iproute2. Notice the additional IP address setup on loopback interface:. Inspect the internal helpuse the? Quagga From Gentoo Wiki. Jump to: navigationsearch. Official documentation.

Open Hub. Router conf t.The Barcode systems help businesses and organizations to track products and prices for centralized management in a computer software system allowing for incredible increases in productivity and efficiency.

However, such systems are usually, as said complex and nothing cheap. If you are a web developer working with or maybe with a big company that for some reason, either to sell something or just because some of the information of the documents generated by your system can be retrieven easily with this kind of tool, then you can implement this feature on your app and offer it for your clients.

They'll be surely happy if they know that they don't need to buy an extra device to scan the code but with only their web camera and achieve at the same time, the same quality. In this article we'll show you how to create a live barcode scanner with JavaScript using the awesome QuaggaJS library in your web application. The library is also capable of using getUserMedia to get direct access to the user's camera stream. Although the code relies on heavy image- processing even recent smartphones are capable of locating and decoding barcodes in real-time.

QuaggaJS is a modified version of the zxing library that makes the scanning process of barcodes for your user easy. Simply speaking, this reader is invariant to scale and rotation, whereas other libraries require the barcode to be aligned with the viewport. This is not yet another port of the great zxing library, but more of an extension to it. This implementation features a barcode locator which is capable of finding a barcode-like pattern in an image resulting in an estimated bounding box including the rotation.

Quagga makes use of many modern Web-APIs which are not implemented by all browsers yet. There are two modes in which Quagga operates:.

Alternatively, you can simply download and include quagga. The script exposes the library on the global namespace under Quagga :. For more information about this library, we recommend you to visit the official repository at Github here. As previously mentioned, Quagga works in 2 ways, using the live scanner with the webcam or processing a static image:.

To be able to scan dinamically with the webcam, you need obviously a browser that supports navigator.

quagga tutorial

Start by initializing Quagg and configure the LiveStream mode. You need to set the type of barcodes that you want to process through the properties readers in the decoder option:. At the end of the article, you can see a full example of the live scanner including the tracking feature. If you want to process images from files either an image uploaded to the server by your user or in the browser directlyyou can do it with Quagga. The only thing you need to do is to set the locate option to true and provide the path to the image or the base64 data uri representation of the image :.

The following document shows a very simple implementation that will display the scanner on the scanner-container div and will track the barcode scanner on it. Once a valid barcode is processed, it will show its result in the console on detected canvas :. Interested in programming since he was 14 years old, Carlos is the founder and author of most of the articles at Our Code World.

Proud Self-taught programmer.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Quagga can be a life saver in case your production router is down, and you don't have a spare one at your disposal, so are waiting for a replacement.

With proper configurations, Quagga can even be provisioned as a production router. In this tutorial, we will connect two hypothetical branch office networks e. Our CentOS boxes are located at both ends of the dedicated link. IP address details are provided below. The Quagga package consists of several daemons that work together. In this tutorial, we will focus on setting up the following daemons. This SELinux policy interferes with the setup procedure we are going to describe, so we want to disable this policy.

Skip this step if you are using CentOS 6. Without this change, we will see the following error when attempting to save Zebra configuration from inside Quagga's command shell.

Quagga comes with a command line shell called vtysh. The Quagga commands used inside vtysh are similar to those of major router vendors such as Cisco or Juniper. First, we configure the log file for Zebra. For that, enter the global configuration mode in vtysh by typing:. Note that once Zebra daemon has started, any change made with vtysh's command line interface takes effect immediately.

There is no need to restart Zebra daemon after configuration change. The OSPF neighbors should come up now. As long as ospfd is running, any OSPF related configuration change made via vtysh shell takes effect immediately without having to restart ospfd.

Make sure that your firewall does not block ping traffic. Inside vtysh shell, you can check if necessary neighbors are up, and proper routes are being learnt. Quagga-enabled boxes will be able to communicate and exchange routes with any other router that you may have in your network. Since it supports major open standard routing protocols, it may be a preferred choice in many scenarios.

Better yet, Quagga's command line interface is almost identical to that of major router vendors like Cisco or Juniper, which makes deploying and maintaining Quagga boxes very easy.

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