Custom Virtual Host in Apache2 in Ubuntu

cd ~
mkdir public_html

Now for each domain create a folder with following template

 
mkdir -p public_html/domain1.com/{public,private,log,cgi-bin,backup}

NameVirtualHost *:80
Listen 80

Make sure this setting is set either in ports.conf or apache2.conf or httpd.conf or in sites-available/default

Now create the vhost file for domain1.com in /etc/apache2/sites-available/domain1.com

with the following settings

<VirtualHost *:80>
  
  ServerAdmin webmaster@domain1.com
  ServerName  domain1.com
  ServerAlias www.domain1.com


  # Index file and Document Root (where the public files are located)
  DirectoryIndex index.html
  DocumentRoot /home/username/public_html/domain1.com/public


  # Custom log file locations
  LogLevel warn
  ErrorLog  /home/username/public_html/domain1.com/log/error.log
  CustomLog /home/username/public_html/domain1.com/log/access.log combined

</VirtualHost>

Now to enable the site in sites-enabled

sudo a2ensite domain1.com

and then restart the apache2 server

sudo service apache2 restart

Modify the host file '/etc/hosts' 

127.0.0.1    localhost 

127.0.0.1    domain1.com

 Now set the owner permissions

~/public_html/domain1.com$ sudo chown -R username:www-data cgi-bin log public
~/public_html/domain1.com$ sudo find ./public -type d -exec chmod 775 {} \;
~/public_html/domain1.com$ sudo find ./public -type f -exec chmod 774 {} \;

likewise for log and cgi-bin

References

1. Apache Virtual Hosts

2. Permissions for /var/www/html 

3. Chmod only to folders and its subfolders 

Wireshark NPF driver isn't working

Wireshark is an network analyzer. Wireshark depends on another utility process called WinPcap.

If the WinPcap service is not running in the background then we get the error "The NPF driver isn't running.  You may have trouble capturing or listing interfaces."

Solution

1. Open Command prompt by right clicking on it  and "Run as administrator".
2. Goto "cd Windows\System32" directory
3. Start the "net start npf"
4. After the success message, Restart the Wireshark

Codenameone Flow Order

This is the flow order of functions that is loaded when an application created using codenameone framework starts

 1. ImmuntiyMeterApp.init(Object context)

 2. ImmuntiyMeterApp.start()

 3. StateMachine.initVars(Resources res)

 4. StateMachine.beforeMain(Form f)

 5. StateMachine.postMain(Form f)

 6. StateMachine.StateMachine(String resFile)

The Web Developer's must have Tool - Firebug

Without Firebug i wouldn't have learned the HTML, CSS, Javascript or the working of Web very quickly.

Firebug is a add-on that is available with  firefox browser and a firefox-lite with chrome.

So what is so great about the Firebug? 

1.  Firebug lets you inspect each HTML elements (like <a>, <div>, <table> ...) and when you inspect the element then the element, its margin, padding, border gets highlighted.

2. On inspecting a element, you can also the view the CSS used to style that part. You can also manipulate and tweak the css to view the result on the fly.

3. To see what all resources are loaded when a page is requested.To find out the time taken and the order in which the resource is loaded. To find out the status, url, domain, ip, size and Header info.

4. To debug JavaScript, to trace the stack flow of the script, to break the script and inspect the DOM and other elements at that time.

Irony of Science in Eid al-Fitr

In today’s world, the science has grown incredibly that we have Hubble Space Telescope  launched into space watching the universe in different spectrums. We have satellites for weather predictions; we have Terrestrial Space observatory Telescope's watching for flares in sun and climate in Jupiter. We have even accurately and safely landed man on the moon. 

We can even accurately predicate solar and lunar eclipse, the exact points in earth where it would be visible. We have even predicated the next arrival of Halley's Comet  and also the distance away from the earth. The next arrival of Halley's Comet is on 28th July 2061, and then on 7th May, 2134  and it will pass within 13.9 million km from earth.

In spite of all these feats, we still haven’t been able to predicate accurately the Eid al-Fitr. In India, all banks and govt office calendars marked 28th July as Eid al-Fitr holiday but it was predicted a day earlier.

The date of Eid al-Fitr for a region is confirmed by the sighting of the new moon.in that particular region. In countries like India, where even the whole nation has same time-zone can't still predicate when the new moon will occur.

How much is the Advertisment Revenues in Media

Advertisment is the primary revenue for most media.

Media	Revenue
TV	18 b$
Newspaper	5 b$
Magazine	1 b$
Radio	1 b$
OOH	444 m$
Cinema	92 m$
Pay TV	166 m$
Others	300 m$

Industries that are spending  in online medium.

• Electronics
• Fashion - Men
• Fashion - Woman
• Baby Care
• Video Games
• Fitness
• Health Care
• Car
• Bike
• Jewellery
• Dating

To insert debug code in all functions using regular expression

Lets illustrate with a Javascript  Source Code and Notepad++ IDE

Regular Expression to Find functions

((\w*)\s*[:|=]\s*function\(\w*\)\s*\{)

Debug Code to insert inside each functions

console.log("functionName");

Regular Expression to Insert Debug Code inside Functions

$1 \n\tconsole\.log\("$2"\)\;

Note: Please enable "Regular expression" and ". matches newline" in Search Mode in Replace box in Notepad++ for inserting inside more than 1 function using regular expression.

A sample Javascript before inserting Debug code

var SyntaxHighlighter = function() {

    var sh = {

        all: function(params)

        {

            attachEvent(

                window,'description'

            );

        }

    };

}();

Javascript code after inserting Debug code using Regular Expression

var SyntaxHighlighter = function() {

      console.log("SyntaxHighlighter");

    var sh = {

        all: function(params)

        {

            console.log("all");

            attachEvent(

                window,'description'

            );

        }

    };

}();

To know more about How this Regular Expression Works and Customisation

Eclipse IDE Shortcuts

1.   System.out.println();

syso + Ctrl + Space

2.  Toggle Comment

Ctrl + Shift + C

3.  Run Application

Ctrl + F11

4.  Import all packages

Ctrl + Shift + O

5.  Auto Complete

Ctrl + Space

6. Generate Getter and Setter

Ctrl + Shift + G

But this shortcut is not default one, so you have to set it in eclipse.

Steps to map a command to desired key combination:

1. Goto 'Windows' menu -> 'Preferences' ->'General' -> 'Keys'
2. In 'type filter text', type 'getter'
3. Select command 'Generate Getters and Setters'
4. Below in 'Binding' field, press CTRL + SHIFT + G
5. In 'When' selection below, select 'In Windows'
6. Click 'Apply'.
7. If in any case there shows Conflicts then either unbind the old one or change your key combo.
8. Click 'OK'

Protect your Privacy in Internet from Google and other Service Providers

DNS Servers
Usually there are two DNS Servers

Prefered  DNS server : 5.135.165.179
Alternate DNS server : 8.8.8.8

Here 8.8.8.8 is the Public DNS service provided by Google.


So best way to protect yourself is by using DNS servers of your ISP or OpenDNS

BSNL DNS Server 1 :  218. 248.240.208
BSNL DNS Server 2 :  218. 248.240.23

or

OpenDNS Server1    :  208.67.222.222

OpenDNS Server2    :  208.67.220.220



More detailed reasoning at How you have no privacy from Google and other service providers