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• Inside BackgroundWorker

  - by João Angelo

  The BackgroundWorker is a reusable component that can be used in different contexts, but sometimes with unexpected results. If you are like me, you have mostly used background workers while doing Windows Forms development due to the flexibility they offer for running a background task. They support cancellation and give events that signal progress…

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• Assessing Relative Maintainability

  - by João Bragança

  We (a contractor, actually) are implementing an off the shelf system to replace a legacy homegrown system for the core domain of the company (designing widgets). Unfortunately both systems will have to run concurrently for some time, as the product just isn't ready yet. Also, the decision was made to only migrate some of the widgets from the…

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• Detecting Installed .NET Framework Versions

  - by João Angelo

  A new year is upon us and it’s also time for me to end my blogging vacations and get back to the blogosphere. However, let’s start simple… and short. More specifically with a quick way to detect the installed .NET Framework versions on a machine. You just need to fire up Internet Explorer, write the following in the address bar and press…

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• Is there an official Ubuntu free technical support team?

  - by João Pinto

  I have found that there is an "Ubuntu Support Team" at https://launchpad.net/~ubuntu-helpteam but I am not sure it's official or active. Please note that I am not referring to bug fixing support, I am referring to the broader OS support, with people available to engage users needing support with a problem and drive it to a proper…

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• WoW runs faster on GNOME Shell compared to Unity

  - by João Vinholi

  I have been trying to run WoW on Ubuntu 12.04. When I run it on unity, the frame rate is very low and it is impossible to play. Although, when I launch it on gnome shell, for some reason, the frame rate gets very high and the playing experience is very comfortable. The problem is that I prefer running Unity instead of gnome…

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• Can't install NetBeans

  - by João Vinholi

  I had never had problems with netbeans installation, but now I am. I have downloaded JDK and JRE properly as I always do and I have started the installation using the terminal as well. When the screen for JDK directory selection comes, I select the JDK folder that I have downloaded, but for some reason the following warning…

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• Wow is very faster on GNOME Shell comparing to unity

  - by João Vinholi

  I have been trying to run WoW on ubuntu 12.04. When I run it on unity, the frame rate is very low and it is impossible to play. Although, when I launch it on gnome shell, for some reason, the frame rate gets very high and the playing experience is very comfortable. The problem is that I prefer running unity instead of…

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• arrays format (Javascript)

  - by João Melo

  i have a list of users, with minions, something like this: User52: minion10 minion12 User32: minion13 minion11 i've been keeping in an array where the "location" is the id, like this: Users: [52]User minions: [10]minion …

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• La búsqueda de la eficiencia como Santo Grial de las TIC sanitarias

  - by Eloy M. Rodríguez

  Las XVIII Jornadas de Informática Sanitaria en Andalucía se han cerrado el pasado viernes con 11.500 horas de inteligencia colectiva. Aunque el cálculo supongo que resulta de multiplicar las horas de sesiones y talleres por el número de inscritos, lo que no sería del todo real ya que la asistencia media calculo que…

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• How to watch Youtube downloading only the audio stream?

  - by Jader Dias

  I would like to save bandwidth when watching youtube, can I get only the audio?

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• How to configure basic authentication in Apache httpd virtual hosts?

  - by Jader Dias

  I'm trying to configure mercurial access using Apache http. It requires authentication. My /etc/apache2/sites-enabled/mercurial looks like this: NameVirtualHost *:8080 <VirtualHost *:8080> UseCanonicalName Off ServerAdmin webmaster@localhost AddHandler cgi-script .cgi ScriptAliasMatch ^(.*)…

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• How to make Windows 7 write to Samba shared folder?

  - by Jader Dias

  I can access and read a Samba folder from Windows 7. I've been following some sites instructions: My Windows 7 is configured like told below: http://www.tomshardware.com/forum/75-63-windows-samba-issue http://www.linuxquestions.org/questions/linux-server-73/windows-7-beta-1-and-samba-696990/ And my smb.conf has…

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• How to aggregate data in Windows Performance Monitor?

  - by Jader Dias

  I have seem performance counters like this: PhysicalDisk(_Total)\Avg. Disk Read Queue Length Which is an aggregation (average, sum, etc) of data over a period. How to create a custom counter which is an aggregation of existent data of another counter?

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• How to run a Turnkey Linux virtual machine on XenServer?

  - by Jader Dias

  Turnkey Linux distributes Linux virtual machines in a Xen compatible format. I have a XenServer instance running and I would like to run a recently downloaded Turnkey Linux virtual machine on it. But I have never used XenServer before. Can you point me a tutorial specific for this case, since the manual doens't…

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• How to add another application to apache?

  - by Jader Dias

  I was following the Zabbix installation tutorial for Ubuntu and it requested that I added a file /etc/apache2/sites-enabled/000-default containing Alias /zabbix /home/zabbix/public_html/ <Directory /home/zabbix/public_html> AllowOverride FileInfo AuthConfig Limit Indexes Options MultiViews Indexes…

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• How to query custom performance counters using Zabbix agent?

  - by Jader Dias

  I was thinking of instead sending data to Zabbix Trapper I could send to Windows Performance monitor and then capture it using Zabbix Agent. Is it possible? How?

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• 2 nics. 2 Defaults Gateways

  - by andre.dias

  Here is my scenario: i have this server with 2 nics, each one with different IPs, connected to differents routers. Almost everything is configured whe way i need. Traffic coming from eth0 exits using eth0, traffic coming from eth1 exits using eth1. And there is a default gateway configured. $route: …

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• How to disable browser audio?

  - by Jader Dias

  I use Google Chrome for Windows. How to disable or mute Flash audio?

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• How to get a CLI for a virtual machine on XenServer?

  - by Jader Dias

  I created a Debian Lenny virtual machine as described on the manual. How to control it? It has no IP since my LAN has DHCP disabled. If it only had a static IP and SSHD enabled I could just PuTTY it.

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• How to avoid bit torrent to degrade my connection performance without limiting bandwidth usage?

  - by Jader Dias

  The only way I found so far to have a normal web surfing, while the uTorrent is on, is to limit its bandwidth usage. There is a smarter way where the torrent can use the remaining bandwidth?

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• How to avoid bit torrent to degrade my connection performance without limiting bandwidth usage?

  - by Jader Dias

  The only way I found so far to have a normal web surfing, while the uTorrent is on, is to limit its bandwidth usage. There is a smarter way where the torrent can use the remaining bandwidth?

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• What are the implications of RPC server unavailable error in the Network Load Balancing Manager?

  - by Jader Dias

  My Network Load Balancing Manager shows that RPC server is unavailable in the specified computer. Unable to connect to COMPUTERNAME. But the load balancing works fine. Should I be worried? I am missing something because of this error?

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• How to manage service failover?

  - by Jader Dias

  I am using Windows Network Load Balancing to keep my apps available even when one of the servers is down. But when all servers are up, but one instance of a service in one of them is down, I would like to not send requests to it, because those requests will be lost. Is there any solution that…

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• Why when I insert data in the history_uint table in Zabbix, the data doesn't shows up in the graphs?

  - by Jader Dias

  and yes, I know I shouldn't be doing this unless I understand the inner workings of Zabbix, which I don't.

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• Is it possible to turn the DSL router/modem into a simple modem?

  - by Jader Dias

  I use a DSL router/modem + a wireless router. If the wireless router spoke PPoE could I suppress the router function of the DSL modem? I want to do that because I think it will reduce a routing hop improving performance and availability.

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