Wednesday, April 30, 2014

Before you buy Cloud Mining

Why would a company sell already bought hashing power to someone else without making 100% bitcoin profit mining it alone. It doesn't make sense at all unless the seller is trying to sell it for a highly over priced amount or scam you.

Some companies say that you can trade the bought GHS but even then bitcoin difficulty rises and GHS drops in value very fast. Unless you are a good short term trader GHS trading is a ripoff. This apply to mining as well with increasing difficulty you will get lesser returns for your GHS plus increased maintenance fee.

Just my thoughts, Please do proper research before you invest in cloud mining.

Tuesday, March 4, 2014

Mahara web services - simple guide

Mahara web services can be installed as a plugin. Installation is a easy process. you can find the steps in here

extract the zip file and put to folders inside mahara /path/to/mahara/webservice and /path/to/mahara/auth/webservice

login to mahara as admin goto menu extensions -> Plugin administration under Plugin type: auth heading install webservice

code check for https so if you do not have SSL in your site and you want to test the web services you can comment out https check part in the code (NOT recommended for a production server)

for example if you want to use REST go to the folder webservice -> rest inside server.php comment

// you must use HTTPS as token based auth is a hazzard without it
/*if (!is_https()) {
    header("HTTP/1.0 403 Forbidden - HTTPS must be used");

Now you can test web services using the built in Web service test client
click Configuration link near webservice plugin. Enable WebServices master switch. under Manage Service Access Tokens add a user and generate a token. Now click Web service test client tab and select
protocol - REST
Authentication Type - Token
Service - choose the service you selected when generating token.
Select a function and enter token.

You can also use curl from another site to access the webservice like this

$service_url = '';
$token = 'your token';

$curl = curl_init($service_url);

$curl_post_data = array(       

 'wsfunction' => 'mahara_user_get_users', // the function to be called
      'wstoken' => $token //token need to be passed in the url

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $curl_post_data);
$curl_response = curl_exec($curl);

$info = curl_getinfo($curl);

if ($curl_response === false) {
    $info = curl_getinfo($curl);
    die('error occured during curl exec. Additioanl info: '.var_export($info));

header("Content-type: text/xml");

echo $curl_response;


Sunday, March 2, 2014

Mahara - Sorry, your registration attempt was unsuccessful. This is our fault, not yours. Please try again later.

Fix is to setup email setting in site options. I installed Mahara on a shared hosting. I'm not sure how to setup email setting required for localhost other than giving working SMTP details. Administration -> Site options -> Email settings

Thursday, February 13, 2014

div losing background color/image when resizing the browser window

When you have div width 100% it apply to browser viewpoint only not the max page width. This can be a problem when you have another div with a fixed width length. The fix is to put a min-width with max possible page width.

html, body{margin:0; padding:0;border: 0;outline: 0;}

<!--The problem-->
<div style="margin:0; width:100%; background-color:#060;">
 Header 1

<div style="margin:0 auto; width:1000px; background-color:#03C;">     
 Text Line 1

<br /><br />

<div style="margin:0; width:100%; min-width:1000px; background-color:#060;">
 Header 2

<div style="margin:0 auto; width:1000px; background-color:#03C;">     
 Text Line 2


Don't forget padding widths when calculating min width.

Wednesday, February 12, 2014

Cannot login to Games for Windows LIVE

Login issue for me was caused by two-step verification. you can either disable it temporally till you finish game or you can use a App password that you can find in your Live account under "Security info".

GFWL can be very annoying at times. I had problems with it every time it was required to play a specific game. Wish they at least give a detailed error message without wasting my time for hours looking for fixes.

Thursday, February 6, 2014

HD 7750 cypto coin mining experience

HD 7750 is a entry level card for mining any kind of coin. suitable for casual mining while you do other stuff in the pc. I mine Feathercoin (FTC) as it has a very low difficulty but I think Litecoin will give the same return when converted to Bitcoins. I get around 2.5FTC per day with pool.

My HD 7750 punch 134 khash/s on Intensity level of 13 in GUIminer-scrypt
GPU clock increased to 825MHz (core speed 800)
Memory clock speed decreased to 700Mhz to reduce temperature. you can change card settings using amd catalyst control center.

It can easily go over 150 Khash/s with more GPU overclocking and increasing the intensity level. I haven't tried to push the card that far since increase core speed make temperature go over the roof.

How to get all results without the first row from a MySQL table

To exclude first row you have to use MySQL limit clause.

select * from table limit 1, 10000000

You can pass 2 values to limit clause first one is the starting row. Row index start with 0 so you have to put 1 to remove first row. Second parameter is the number of result u need to retrieve. Put a number that is larger than max rows of table.

Sunday, September 15, 2013

Disable other_vhosts_access.log in ubuntu

Check the following location for apache2.conf and other-vhost-access-log

Open those files and check for the line with other_vhosts_access.log and comment them out with # sign in front of the line.

Restart Apache.