Fix: That Account Has Already Been Added Error on Android HTC Desire HD
After updating my HTC Desire HD to HTC Sense 3.0 I can't login anymore to Twitter app 2.1.2 with error message "That account has already been added". I tried to update the Twitter app to version 3.0.0 but still got the same problem.
A quick Google search found a page on Twitter help center that mentioning a known bug/issue with the same error message as I got. Following the suggestion I uninstalled the update version 3.0.0 and restart my device, alas it doesn't fix it. I'm stuck with Twitter version 2.1.2 and can't uninstall it as it's embedded on HTC sense.
Then I tried to login using another Twitter account which I didn't added yet to my phone and it works, I can login. It turn out that the problem was on "Accounts & sync" settings, the Twitter sync setting had a problem with login, so the steps that I take to fix it:
1. Go to Settings > Accounts & sync
2. Tap on the Twitter account
3. Tap on Remove account
4. Go to Twitter app and try login again
Those steps should fix the problem and you don't need to reboot your phone.
High Capacity 2430mAh for HTC Desire HD is Fake
I have HTC Desire HD Android smartphone which is a great phone, I really love its big screen which make working with it is easy and pleasant. However, the big screen also have its negative impact to battery life. The original battery from HTC only have 1230mAh which hardly last for 1 day on normal usage. My normal usage would be: short phone calls, SMS, automatic email checking, chatting and play scrabble.
Last month I browsed eBay to look for a spare battery and found some seller sold 2430mAh high capacity battery for HTC Desire HD. By the number it should double the life battery expectancy. Interested, I bought one of them from a Hongkong seller. The Delivery was fast, it took 7 working days to arrive in the Netherlands.
Unfortunately the battery doesn't deliver as I expect it would. The battery life is only 1 day, same with the original battery. But for US$ 10 with free shipping I wouldn't complaint, I was pessimistic when bought it but decide to buy it anyway. Well.. at least I have spare battery now 
What does 4G mean and what’s next?
"4G" is advertised by many mobile phone providers and is an indicator of how fast the connection speeds are on mobile phones and tablets. 4G actually stands for 4th generation cellular network hardware. Implementing 4G has been a revolutionary mark for providers. The hardware and software required to obtain speeds that should be able to reach as high as 20 mb/s when completely implemented. The technology for the speeds varies based on which provider you ask.
The most common term is LTE, which stands for Long Term Evolution. Another software, known as WiMax, which stands for Worldwide Interoperability for Microwave Access, is comparable to LTE and also enhances speeds that rival common Internet Providers as it compares to current Wi-Fi speeds. You may also hear about HSPA+, which stands for High-Speed Packet Access, and is really a glorified improvement to 3G connections under the mask of 4G speeds but has potential to reach the same speeds when the full hardware is rolled out by providers.
With all these advances technological terms you really probably only want to know what the best deal for your money is and where you can get the fastest speeds. Coverage for 4G networks is limited by provider and typically only available in larger cities, although it is expanding and expected to reach more areas as its popularity increases.
Since the rage is all about 4G you may be wondering what comes after this. Well, technically it will be 5G but really shouldn't be a concern at the moment. 4G still needs to expand to cover more areas and customers and once coverage is expanded it needs to be perfected to allow devices to get optimal speeds. It still has a long way to go before it can be utilized by the mainstream mobile phone user, but has significant potential to replace primary internet providers.
Minimum Install VNC Remote Desktop Server on Centos
I wrote an update for an article that i wrote a couple months ago here It's a tutorial to install VNC on Linux Centos VPS. On that tutorial I was installing the group package of Gnome Desktop which will install all Gnome's applications including Open Office. This of course requires a lot of space and RAM resources to be run on a VPS which most of the time we don't need Open Office etc.
My self only use the VNC server that I installed in a VPS located in US datacenter to access some website which only available for US visitors. For browsing purposes I only need Gnome minimum install and Firefox browser and that is what I installed on this tutorial.
You can read my tutorial here: Minimum Install VNC Remote Desktop Server on Centos
Wireless modems vs wireless hotspots
More and more, we are getting used to the idea of being able to access the Internet no matter where we are. With the spread of smart phones and tablet devices, coupled with the ever-expanding 3G and 4G wireless networks, it seems like people are constantly connected. However, while you can always rely on 3G and 4G outside of your home, you also have to figure out what kind of wireless connection best suits your home environment. Basically, there are two options: you can purchase a wireless internet hotspot, or invest in a wireless modem, and both will keep you connected inside of your home. The following is a brief comparison (based on data from wirelessinternet.net) to help you choose between the two, if you are looking to set up your home with a wireless network.
Wireless Modem – If your home has already had a wireless Internet connection for a few years, you are likely using a wireless modem. These are the popular modems you have likely seen in people’s houses that are usually about the size of a book, with small antennae and a plug that goes into a normal outlet. The downside of these machines is that they do have to be plugged into a home outlet, meaning that they provide wireless connection within your home, but no further, and they are not portable. However, they do provide quick and reliable wireless internet connection for multiple devices at once.
Wireless Hotspot – Perhaps an increasingly common tool for wireless Internet service, the main benefit of a wireless hotspot is that it is portable, usually pocket-sized. These hotspots bring you a wireless connection using the 3G and 4G networks, meaning that you will be able to connect wherever these networks are present. For many people, this portability is the most important feature of a wireless internet provider. However, because of its smaller size and dependence on the 3G and 4G wireless networks, a wireless hotspot has limits in terms of data storage; also, it does need to be charged from time to time.
There is not necessarily a right answer between these two different wireless providers. But before you invest in one or the other, it is prudent to do a bit more research and figure out for certain which one will better suit your needs. The above comparison lists the basics for you, but you may want to give a closer look to the similarities and differences between them, and the benefits that each one offers. Either way, you will soon be connected to a quick and reliable wireless network.
This is why there are 32 bit packages on 64 bit Linux Centos
I just installed a new server with Linux Centos 64 bit installed and noticed that actually some 32 bit packages was also installed when I'm running yum upgrade. There was nothing wrong in YUM configuration that I can find.
It turns out that the reason for those 32 bit packages being installed is that Centos follow the upstream source, hence the 64 bit (x86_64) installation by default will also install 32 bit packages. Since I want to have pure 64 bit system then I remove all 32 bit packages that installed on my server and set the exclude option so that 32 bit will not installed by yum command.
To remove all 32 bit packages run the command:
HTC Desire HD Proximity Problem and How to Fix it
Just had my HTC Desire HD (or shortened as DHD) for a few months now, been happy using it but then I start to notice a problem with its proximity sensor.
Symptom: when making a short phone call the screen is dimmed and stays so for several minutes, this causes more battery usage. The bigger problem is when I make a long phone call, the screen went turned off after some period and didn’t come back on when I move away the phone from my face (while it should).
Modify the Maximum Emails a Domain Can Send per Hour
On Cpanel’s Tweak Settings you can limit the maximum each domain can send out per hour. The problem is that this limit also applies to Mailman mailing list hence causing problem for mailing list owners.
The problem happen when the mailing list has members more than the maximum number of email a domain can send per hour. Once the mailing list hit the max limit, the emails start to be bounced back or dropped by Exim from its queue.
To fix this problem administrator can set a limit for a specific domain on the server by modifying /var/cpanel/maxemails file and add the domain that want its limit to be override:
domain.com=120 domain.net=500
Then run /scripts/build_maxemails_config to apply the new limit.