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Today I have published in OKay's RPM repository RPMs for PhantomJS 2.0. PhantomJS is a headless WebKit scriptable with a JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search phantomjs.

Enjoy!

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In my current work, my boss got a project about getting data from websites and posting into a system. Sadly, one of those websites lacks an API, so we needed to figure out a way to get information from there. The short answer is scraping. To make this story short, after evaluating multiple projects, I think the best option is to use CasperJS.

CasperJS is an open source navigation scripting testing utility written in Javascript for the PhantomJS WebKit headless browser and SlimerJS (Gecko). It eases the process of defining a full navigation scenario and provides useful high-level functions, methods syntactic sugar for doing common tasks such as:

  • defining ordering browsing navigation steps
  • filling submitting forms
  • clicking following links
  • capturing screenshots of a page (or part of it)
  • testing remote DOM
  • logging events
  • downloading resources, including binary ones writing functional test suites, saving results as JUnit XML
  • scraping Web contents

To install CasperJS, I did the following.

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November 23th, 2015 I was walking in front of Parliament of Canada. I took this photo, accidentally if I would like to take it as it is, I think I wouldn't.

I was told that there is a funny law about buildings. In Ottawa, a building can not be higher than the Parliament.

Enjoy!

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Some days ago, I got a new customer with an odd and fuzzy request. Initially, he only wanted to handle 500 simultaneous calls. 

As I provide White Label VoIP Server with FusionPBX, they use the interface to accomplished this. The bad thing was performance, server was having about 120 overload index (Linux metric). So I spent about 5 hours figuring out what was happening, as it was  not normal. My findings were:

  • DB handlers were running out
    • XML Handler from FusionPBX does not release the DB handlers. As discussed with FusionPBX author, FreeSWITCH seems to try to release it as well, if it is not released it cores dump; this is not confirmed.
    • By default, using my RPM's, FreeSWITCH profiles and core will use DB to store information.
  • Not the best way to accomplish the goal
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One of the impossible missions I was asked to do in my current job was to install Official Supported PHP 5.5.x on a RedHat 6. Yes, I know, there are many backports, but it was a must to be Official from RedHat.

For those who don't know, a Software Collections is kind of a backport. They don't replace the current release shipped within the distribution, but they allow to work in the same box. I really don't like Software Collections, because they are installed into the /opt (RedHat way), and to use them, you must use the scl command to log into a root jail. You will need to use a Software Collection only if the version in your distribution does not satisfy your need (for example you need PHP 5.4 or better in a RedHat 6).

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Today I have published in OKay's RPM repository RPMs for Syncthing 0.12.4. Syncthing is a complete synchronization, multi-platform solution to have same files in your devices. It is like a Peer-to-Peer.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search syncthing.

Enjoy!

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Today I have published in OKay's RPM repository RPMs for FreeSWITCH. FreeSWITCH is a complete VoIP switch that works on many platforms, including Centos 6 and Centos 7. This is one of the biggest packages I have ever done; there are more than 1600 hours of work behind to make it work. When updating you will notice it will download many libraries, most part of them not available anywhere.

RPMs for Centos 6 under 32-bit platform are compiled without video support. There is a bug in the libyuv that prevents compilation under 32 bits. I will republish these RPMs as soon as it has been fixed, or someone send me a patch. Anyway, who uses 32-bit switch if you have 64 bits.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search freeswitch.

Enjoy!

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Today I have published in OKay's RPM repository RPMs for FreeSWITCH 1.6.5. FreeSWITCH is a complete VoIP switch that works on many platforms, including Centos 6 and Centos 7. This is one of the biggest packages I have ever done; there are more than 1600 hours of work behind to make it work. When updating you will notice it will download many libraries, most part of them not available anywhere.

RPMs for Centos 6 under 32-bit platform are compiled without video support. There is a bug in the libyuv that prevents compilation under 32 bits. I will republish these RPMs as soon as it has been fixed, or someone send me a patch. Anyway, who uses a 32-bit switch if you have 64 bits.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search freeswitch.

Enjoy!

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When you run a commercial PBX, especially for business, it is very common they have more than one DID for more than one city. One of the first requests you will get is to let your customer use their local phone number when calling to a specific area.

To do this, I wrote this dialplan.

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Today I have published in OKay's RPM repository RPMs for CSync2 2.0.0. Csync2 is a cluster synchronization tool. It can be used to keep files on multiple hosts in a cluster in sync. Csync2 can handle complex setups with much more than just 2 hosts, handle file deletions and can detect conflicts. It is expedient for HA-clusters, HPC-clusters, COWs and server farms.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search csync2.

Enjoy!

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In my current job (that I haven't discussed yet), I and my boss (and company owner) were having a discussion about how server management, specifically speaking about IPTables rules. You must know he is 100% in love of ClearOS (a RedHat fork, just like CentOS). ClearOS uses a web UI to manage almost everything. In this little post, I will try to explain my points of view why we have to give up the IPTables frontend of ClearOS and go to a better and more professional solution.

ClearOS is very easy to use, almost any Linux newbie could start managing his server, but in my humble opinion, there is a price to pay. As you start getting knowledge (IPTables in this case), you will realize that the basic UI is not enough. ClearOS has an advanced IPTables interface (I have tested ClearOS 6 only), but using that interface and doing manual IPTables managing from the CLI is literally the same. The interface is just a text field where you can input the IPTables command.

Using any of the ClearOS interfaces is okay if you don't manage multiple servers or you don't need any complex rules. But you will see that complex scenarios require an advanced tool. Some scenarios could be:

  • where you manage multiple servers that inter-relate each other (let's say a cluster for example),
  • where you have different interfaces and the traffic allowed on each one is very different (let's say a layer-two VPN), or
  • where you manage many servers and need to review in what server you are allowing or banishing a specific IP

I want you to introduce Firewall Builder. I usually don't use GUI's, but I am doing an exception with this tool. Firewall Builder will allow you to manage as many rules as you want in as many servers you want. Currently, I am managing no less than 20 servers with it. I can drag objects into the interface and when I modify an object (let's say a user changes his IP), then the tool will show me what servers need a rule push.

One of the things I love from Firewall Builder is the shadowing detect capability. It is very common when you have many rules that one rule allows what other rejects. Firewall Builder let' s you detect this issue before pushing the rules.

Firewall Builder lets me focus on the rule management, and of course, you will learn how to build complex rules as well.

Enjoy

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Today, while I was watching TV, I got a support request from one of my customers; his name doesn't matter. Issue was conferences were not working, first user was able to join, but the second couldn't. So, here it is my explanation of the bug; I hope this is useful for someone.

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This is a common scenario I have found. At least, here in Canada, it is very common you change Internet provider if you find a better deal. So, if you have VoIP in your home or office, this means you will need to change your router (sometimes called modem).

For unlucky owners of Aastra telephones, you will notice your telephone won't work using the new modem. It seems there is a bug on the firmware, the only possible solution I have found is by doing a hardware reset of the telephone. Take note of your SIP credentials, because you will need to enter them; this could be a good opportunity to configure auto-provisioning if you have your own PBX (like FusionPBX).

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Today I have published in OKay's RPM repository RPMs for JsonCPP 1.6.5. JsonCPP is a lightweight data-interchange format. It can represent numbers, strings, ordered sequences of values, and collections of name/value pairs. JsonCpp is a C++ library that allows manipulating JSON values, including serialization and deserialization to and from strings. It can also preserve existing comment in unserialization/serialization steps, making it a convenient format to store user input files.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search jsoncpp.

Enjoy!

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Today I have published in OKay's RPM repository RPMs for SHC 3.8.9. SHC is a generic shell script compiler that allows you to hide your Linux shell scripts.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search shc.

Enjoy!

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Today I have published in OKay's RPM repository RPMs for PhantomJS 1.9.8. PhantomJS is a headless WebKit scriptable with a JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search phantomjs19.

Enjoy!

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Nowaday it is very common that everybody changes their system to a 2-factor authentication system. But before going to the mainstream, let's define what are the possible factors:

  1. Something you know: like a password, you can transmit this kind of information by a simple text. In other words, knowledge.
  2. Something you have: like a credit card, you can transmit this kind of information by giving the item. In other words, a physical token.
  3. Something you are: like your fingerprint, you can transmit this kind of information just if you cut the member from yoursef. In other words, any kind of information attached to your body.

Many studies (not discussed here) show that if you enforce those 3 factors at the same time, people just stop using your system. Therefore, the best is just 2 of 3 factors, you decide which ones.

First factor (something you know) is the most common on any system. Banks and serious enterprises are changing to tow-factors authentication by adding the next most simple factor: something you have.

email2factor is a project born from a brainstorming in my current job. This simple but powerful project will allow you to convert almost any opensource project and linux services into a double factor authenticated one without modifying the code. The magic is simple, email2factor will use email as something you have token.

Hope this will help you alot.

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EstoyEn it is a project from my own that allows you to access contents from websites that have geolocalization restrictions. For example, Hulu (where you can watch episodes 1 day after they were in US TV) is only available in the US. With this project I enable you to watch Hulu (of course you will need to have a paid subscription). Other good example is the Netflix; Netflix changes its catalog depending what country you are connecting from (not what paypal or credit card you use). Using my service you will be able to change between zones.

I have been working trying to make this work on many platforms as possible: Playstation 3 & 4, Wii U, AppleTV, Smart TV, Blueray, Windows, Android, iOS, etc. And as many services providers I found.

The project offers DNS and PPTP & OpenVPN type VPN. If you are a movie fan, or you don't want to get out this winter I can tell you this kind of service is what you need.

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Today I have published in OKay's RPM repository RPMs for PAM Memcached2 1.0.0. This PAM module will allow you to accept or deny authentication based on existence of a key in the memcached. This can speed things up of course. I will talk later about how to use it.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search pam-memcached2.

Enjoy!

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Today I have published in OKay's RPM repository RPMs for PAM script 0.1.12. This PAM module will allow to run a customized script when a user start or ends session. It can be used in the authentication or the session part of the config file.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search pam-script.

Enjoy!

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Today I have published in OKay's RPM repository RPMs for Syncthing 0.12.2. Syncthing is a complete syncrotnization, multi-platform solution to have same files in your devices. It is like a Peer-to-Peer.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search syncthing.

Enjoy!

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In Flanders fields the poppies blow
Between the crosses, row on row,
That mark our place; and in the sky
The larks, still bravely singing, fly
Scarce heard amid the guns below.

We are the Dead. Short days ago
We lived, felt dawn, saw sunset glow,
Loved and were loved, and now we lie
In Flanders fields.

Take up our quarrel with the foe:
To you from failing hands we throw
The torch; be yours to hold it high.
If ye break faith with us who die
We shall not sleep, though poppies grow
In Flanders fields.

John McCrae

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I've got an interesting booklet about how to do an online business. It has its interesting points, not everything applies to every online business model, but it is a good point to start. So I am going to comment the first topic called "Going into business". This first summary will ask you why are you doing this. Be ready to answer this question.

Before you begin working on your business, you need to  work out what you want to get out of it. Think carefully; the answers you come up with might surprise you. Creating a business from scratch can be exciting and rewarding, but it also involves time, effort and money. So it's essential to understand why you're doing it: a clear sense of purpose will help propel you through what is likely to be a demanding process.

You should start with a self-assessment:

  1. Determination: about all else, you need to have the stamina and drive to finish what you start.
  2. Humility: the ability to recognise that you don't know everything is essential. Do research and be flexible to change. Arrogance is a business-killer.
  3. Decisiveness: nothing gets done unless you make decisions. There is a never ending process of information-gathering followed by decision-making.
  4. An analytical mind: evaluate every aspect of your business and the market in which it operates.

Unless you are sitting on a big pile of cash, the safest way to start up a business is to run it while you are working for someone else.

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First timers in Canada will see that in the week of November 11th, people start carring a little red flower pin. So the first question is, why? Well here it is the answer. It was given in my french course, but it is quite siemple to follow.

L'Histoire du Coquilicot

Le jour du souvenir - Le 11 novembre

Pourquoi le coquelicot a-t-il été coisi comme symbole du Souvenir de nos morts?

Le coquelicot est un symbole international á la mémoire de ceux qui sont morts à la guerre. Son origine est aussi internationale.

Un écrivain fut le premier à établir un rapport entre les coquelicot et les champs de batailles durant les guerres napoléoniennes au début du19e siècle. Il remarqua que les champs qui étaient nus avant le combat se couvraient de fleurs rouge-sang après la bataille.

Avant la première guerre, peu de coquelicots poussaient en Flandres. Durant les terribles bombardements de cette guerre, les terrains crayeux devinrent riches en poussière de chaux, favorisant ainsi la venue des coquelicots. La guerre finie, la chaux fut rapidement absorbée et les  coquelicots disparurent de nouveau.

Le lieutenant-colonel John McCrae, un médecin militaire canadien, établit le même rapport entre le coquelicot et les champsde batailles et écrivit son célèbre poème "In Flanders Fields" (dans les champs des Flandres). Le coquelicot devint rapidement le symbole des soldats morts au combat.

Quelques années plus tard, une américaine, Moina Michael, qui travaillait dans une cantine de la YMCA à New York, se mit à porter un coquelicot en mémoire des millions de soldats qui avaient donné leur vie. En 1920, cette coutume vint à la connaissance d'une française, Madame Guérin, en visite aux États-Unis. À son retour en France, elle décida de se servir de coquelicots faits à la main pour récolter des fonds pour les enfants sans ressources des régions dévastées du pays. En novembre 1921, les premiers coquelicots apparuent au Canada.

Grâce aux millions de Canadiens qui chaque année en novembre portent la petite fleur rouge, le coquelicot a survécu comme symbole et les Canadiens continuent de se souvenir de leurs 114,000 morts.

Well, here it is a little why.

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In more than one occasion you need to put a module inside an article or a bigger module. Well, here's how:

  1. Create the module and indicate to the container a non existent name, so that the module is published but not visible.
  2. Edit the item and add between braces loadposition xxx,where xxx is name of the container of step 1

There is another method:

  1. Edit the article and place loadmodule yyy also between brackets. Where yyy is the name of the module, it does not necessarily have to be published in an unseen container. This method does not work for all modules.

Tested on Joomla 3.4.x.

 

 

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LinuXchangE (LXE) is the project of my degree as a computer engineer. The project aims to remove all end servers using Microsoft technology infrastructure and maintain client-side Windows computers as transparent as possible.

Among many features it has, the most outstanding are:

  • One login account for everything. If your username is Miguel, then you will use that username and the same password for all the infrastructure services.
  • Solid core. LXE has a small core where all all information is store.
  • Openness. Because the use of standard technologies, you can integrate your own projects to the core. You can link authentication by LDAP, PAM, Kerberos, IMAP or NTLM.
  • Standard services. Among many services, the most notable are: mail, storage, IM, web browsing.

LXE takes advantage of the following projects:

  • Samba
  • OpenLDAP
  • Heimdal
  • Postfix
  • Squid
  • PAM
  • and many others

Sadly, LXE development is stopped because there were more occupations to do for living. Anyway, you are welcome to make a donation and encourage the restart of this project.

 

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In more than one ocasion, I have been in situations where I need to know what directory is the one who uses the most space in the disk. In order to know this. Follow the next steps:

  1. go to the parent directory you want, for example /var: cd /var
  2. type du --max-depth=1 -H | sort -n -r

The first line of the output will bhe the directory using the most part of the available space.

Enjoy!

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Yesterday I have published in OKay's RPM repository RPMs for Syncthing 0.12.1. Syncthing is a complete syncrotnization, multi-platform solution to have same files in your devices. It is like a Peer-to-Peer.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search syncthing.

Enjoy!

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Most of people who know me knows that I am not only a freelancer, but a business man. Sometimes I need to hire freelancers for specific projects.

One of the biggest concerns I have is the confidenciality. Because of this, I have search and I have found the following. This is the Spanish version, as most part of people I hire speak Spanish as their first language.

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In all my experience as a VoIP & Linux expert, I have tried some FreeSWITCH frontends. I can tell that FusionPBX has been the easiest and fastest way to manage a FreeSWITCH VoIP server. I have been using FusionPBX since release 2.x and I can tell you it will help the newbie and the expert to speed up PBX management. Currently I manage about 15 PBX'es and I can tell that there are few tasks I haven't been able to do with this project.

The objective on this article is to present in a clear way what does FusionPBX offer and to avoid false ideas of the project.

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When you have a cluster using FreeSWITCH (all PBX'es share same database among other things), you will need to know who is the least load server. Regardless what are you using this information for, or how you grab it, you can easily get it doing the following SQL query (remember FreeSWITCH's default database name is freeswitch):

SELECT t.hostname, SUM(t.load_index) AS load_index FROM (select hostname, count(hostname) * 1.5 AS load_index FROM channels GROUP BY hostname UNION SELECT hostname, COUNT(hostname) AS load_index FROM registrations GROUP BY hostname) t ORDER BY load_index DESC

You will get a list of hostnames members of the cluster and a load index.

Remember you will need to use the core-db-dsn and the core-recovery-db-dsn tags in the switch.conf.xml file in order to be able to have the required tables.

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Wget is a very powerful tool to get contents using the CLI. Here I am going to show you how you can download a whole website.

wget --mirror --convert-links --adjust-extension --page-requisites -e robots=off inside-out.xyz

This will download all the website in a directory called inside-out.xyz. After that, some HTML code may have absolute hard-coded. So we use find and sed commands.

find -name '*.html' -type f -exec sed -i 's/http:\/\/inside-out.xyz\///g' {} \;

This will change tags like <img src="http://inside-out.xyz/images/logo.png" /> to <img src="/images/logo.png" />

Enjoy!

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Internet has many programs to try free calls. SIPCLI, a command line SIP agent. It is used for many things, including auditing and looking for misconfigured SIP servers.

The following IPTables rules will let you to prevent these attacks:

iptables -I INPUT -j DROP -p udp --dport 5060 -m string --string "sipcli/" --algo bm
iptables -I INPUT -j DROP -p tcp --dport 5060 -m string --string "sipcli/" --algo bm
iptables -I INPUT -j DROP -p udp --dport 5080 -m string --string "sipcli/" --algo bm
iptables -I INPUT -j DROP -p tcp --dport 5080 -m string --string "sipcli/" --algo bm
iptables -I INPUT -j DROP -p udp --dport 5060 -m string --string "friendly-scanner" --algo bm
iptables -I INPUT -j DROP -p tcp --dport 5060 -m string --string "friendly-scanner" --algo bm
iptables -I INPUT -j DROP -p tcp --dport 5080 -m string --string "friendly-scanner" --algo bm
iptables -I INPUT -j DROP -p udp --dport 5080 -m string --string "friendly-scanner" --algo bm

These rules will drop connection of any packet with the frendly-scanner or sipcli/ string within. Please note that this solution is not absolute, but they are a good start to protect yourself.

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Today I have published in OKay's RPM repository RPMs for the Codec a52 (AKA AC-3). AC-3 is very common on Digital TV and DVD players. So, you may want to recompile ffmpeg, vlc or anyother player to use it.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search a52dec.

Enjoy!

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Today I have published in OKay's RPM repository RPMs for FFMPEG. FFMPEG is a complete cross-platform solution to record, convert and stream audio and video.

RPM's are available for Centos 6 and 7. And you can find it if you type yum search ffmpeg.

Enjoy!

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In my french class I got the following text in which it explain why the pumpkin. It is in french, of course, but you can use any translator if you dont understand.

Halloween

Du navet à la citrouille

L'origine de l'Halloween remonte à plus de 2 000 ans. À l'époque, la France et l'Angleterre sont habitées par la peuple celte. Le calendrier des Celtes est différent du nôtre; la nouvelle année débute le 1er novembre. À cette occasion, les Celtes se régalent des produits cuiltivés pendant l'été. Mais la fête n'est pas entièrement joyeuse; dans la nuit qui sépare la vieille année de la nouvelle année, les âmes des morts reviennent sur terre. C'est du moins ce que croient les Celtes.

Pour protéger les vivants des mauvais esprits, les druides allument sur les collines de gigantesques feux. Et quand les Celtes doivent sortir, les soir, ils apportent avec eux des navets qu'ils on vidés et à l'intérieur desquels ils ont placé une chandelle. Ainsi, les mauvais esprits ne peuvent rien contre eux, croient-ils!

À cette époque, les célébrations du 31 octobre et du 1er novembre n s'appellent pas encore Halloween mais Samhain, ce qui signifie, en lange celte: "la fin de l'été".

Vers l'an 900, l'Église crée, le 1er novembre, une nouvelle fête religieuse: la TOUSSAINT. Comme son nom l'indique, c'est la fête de tous les saints. En anglais, cela se dit: All Hallow Day. Et toujours en anglais, la veille de la Toussaint se dit: All Hallowed Even. Cela donnera HALLOWEEN.

L'histoire de l'Halloween se poursuit en Irlande, vers l'an 1600. Les Irlandais sont les descendants des Celtes. ils son très superstitieux et croient toujours que, le soir du 31 octobre, les âmes des morts reviennent sur terre. Pour se protéger, ils installent devant chaque maison un navet vide avec une chandelle à l'interieur. Et pour décourager les esprits d'approcher, ils découpent dans le navet un visage grimaçant.

En plus, les enfants vont de porte en porte demander à chacun une offrande pour les morts. Si quelqu'un refuse, les enfants ont le droit de lui jouer des tours, parfois méchants.

Vers 1850, des milliers d'Irlandais émigrent au Canada et aux États-Unis. Ils apportent la tradition de l'Halloween et découvrent que les citrouilles font de bien plus jolies lanternes que les navets! Pour éviter de se faire jouer des tours, les adultes continuent, le soir du 31 octobre, à donner des friandises aux enfants.

Aujourd'hui, on continue à célébrer l'Halloween. Mais on pense plus aux enfants du Tiers-Monde qu'aux morts. Alors, le soir du 31 octobre, ne sors pas sans ta tirelire de l'Unicef.

So, Halloween is more an European tradition, but the pumpkin adoption was taken in United States.

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Sometimes for odd reasons you will need to connect directly to IMAP protocol and do tests using the telnet tool. Here it is a little example on how I did it:

# telnet localhost imap
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ STARTTLS AUTH=PLAIN] IMAP gateway ready

a1 LOGIN info 123
a1 OK [CAPABILITY IMAP4rev1 LITERAL+ CHILDREN XAOL-OPTION NAMESPACE QUOTA IDLE] LOGIN completed
a2 LIST "" "*"
* LIST (\HasChildren) "/" "Public folders"
* LIST (\HasNoChildren) "/" "INBOX"
* LIST (\HasNoChildren) "/" "Outbox"
* LIST (\HasNoChildren) "/" "Deleted Items"
* LIST (\HasNoChildren) "/" "Sent Items"
* LIST (\HasNoChildren) "/" "Drafts"
* LIST (\HasNoChildren) "/" "Junk E-mail"
* LIST (\HasNoChildren) "/" "Trash"
a2 OK LIST completed

a3 EXAMINE INBOX
* 840 EXISTS
* 777 RECENT
* FLAGS (\Seen \Draft \Deleted \Flagged \Answered $Forwarded)
* OK [PERMANENTFLAGS (\Seen \Draft \Deleted \Flagged \Answered $Forwarded)] Permanent flags
* OK [UIDNEXT 7368] Predicted next UID
* OK [UNSEEN 829] First unseen message
* OK [UIDVALIDITY 17] UIDVALIDITY value
a3 OK [READ-ONLY] EXAMINE completed

a4 FETCH 1 BODY[]
* 1 FETCH (BODY[] {16382}
<MAIL BODY>
FLAGS (\Seen))
a4 OK FETCH completed

a5 LOGOUT
* BYE server logging out
a5 OK LOGOUT completed
Connection closed by foreign host.

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Hi There,

Welcome to my Inside Out blog. Here, you can expect posts about the following topics:

  • Sample codes to do some specific tasks
  • VoIP configuration
  • Some critics
  • My experience migrating to Canada
  • Money and Financial advice

And many other topics.

About

Read about IT, Migration, Business, Money, Marketing and other subjects.

Some subjects: FusionPBX, FreeSWITCH, Linux, Security, Canada, Cryptocurrency, Trading.