Asif Javed's Blog

Change Ubuntu Server from DHCP to a Static IP

admin — Sun, 17 Jul 2011 11:33:14 +0000

sometime Ubuntu Server installer is set to use DHCP, and later You want to change it Static IP, so that people can access it and it would not dynamically assigned ip.

Server usually don’t have GUI interface so we need to do it using bash commands.

Let’s open up the /etc/network/interfaces file. I’m going to use my favourite editor vi, but you can choose your own.

sudo vi /etc/network/interfaces

For the primary interface, which is usually eth0, you will see these lines:

auto eth0
iface eth0 inet dhcp

As it can be seen that it is using DHCP right now. We are going to change dhcp to static according some general network setup, but you can customise and change the ips according to your network.

auto yeth0
iface eth0 inet static
address 192.168.1.100
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1

Now we’ll need to add in the DNS settings by editing the resolv.conf file:

sudo vi /etc/resolv.conf

On the line ‘name server xxx.xxx.xxx.xxx’ replace the x with the IP of your name server. (You might use ifconfig /all to find out)

You might also need to remove the dhcp client for this to stick. You might need to remove dhcp-client3 instead.

sudo apt-get remove dhcp-client

Now restart the networking components:

sudo /etc/init.d/networking restart

Ping www.google.com. If you get a response, name resolution is working (unless google is in your hosts file ).

dashes vs underscores (SEO)

admin — Sun, 10 Jul 2011 11:37:23 +0000

Dashes or Underscore, which is best for seo point of view

if you are a web developer and want to build websites with SEO optimisation. You might face this question “which is SEO way to split words in URL, dashes or underscore?”.

I would recommend using dashes. Why? Lets find out.

Many programming language have stuff like _MAXINT, which is different than MAXINT. So if you have a url like word1_word2, Google will only return that page if the user searches for word1_word2 (which has rear chances). If you have a url like word1-word2, that page can be returned for the searches word1, word2, and even “word1 word2″.

That’s why I would always choose dashes instead of underscores.

Does Google penalize for dashes

Google doesn’t algorithmically penalize for dashes in the url. And bear in mind that if your domain looks like www.buy-cheap-viagra-online-while-consolidating-your-debt-so-you-can-play-texas-holdem-while-watching-porn.com, that may attract attention for other reasons.

How to change the max_execution_time time on system runing FCGID

admin — Wed, 06 Jul 2011 19:49:07 +0000

How to change the max_execution_time time on system runing FCGID (run as virtual server owner)

1. Change max_execution_time in home/php5/php.ini file.
2. Now change the execution type from FCGId to Apache mod_php (run as Apache’s user).

somehow changes made in php.ini is not being reflected. so We need to change php script execution mode type to execute long scripts.

find all files between specific days (4 days old).

admin — Mon, 06 Jun 2011 19:49:31 +0000

find ./ -type f -mtime -4 -exec ls -al {} \;

Google I/O 2011: Keynote Day 2

admin — Sat, 21 May 2011 00:12:06 +0000

Google I/O 2011: Keynote Day One

admin — Sat, 21 May 2011 00:08:52 +0000

http proxy tool – monitor your computer for http trafic

admin — Fri, 20 May 2011 23:22:21 +0000

There are numerous proxy tools meant to aid security auditors – most notably WebScarab, Paros, Burp, ProxMon, andPantera. Stick with whatever suits your needs, as long as you get the data you need in the format you like.My favourit is Burp

best adsense and google analytics and other plugin for wordpress

admin — Thu, 19 May 2011 14:41:30 +0000

I have tried many plug-ins but ones which I like most are

1) Awesome Google Adsense WordPress Plugins
2) Best Google AdSense WordPress Plugins

Google Analytics Plugin

1) Google Analytics

Best Quiz, Tests, Surveys Plugins for wordpress

1) WP Survey And Quiz Tool

Google Code University – learn about current computing technologies and paradigms

admin — Fri, 06 May 2011 06:09:16 +0000

Recently I came across a good learning resource “Google Code University”. GCU aims to provide “course content and tutorials” for IT professionals. There are all types of lessons available from basic to more advance levels. One thing, which I believe every developer should know is “Web Application Exploits and Defences”. This is not it there are many articles available about web programing, web security, algorithms, distributed systems and much more. Its really worth spending some time to explore all this.

Web Examination question or survey plugin for wordpress

admin — Tue, 03 May 2011 14:39:40 +0000

Last time I introduce Web Quiz, Now I come accross another wordpress plugin, which is similar but have a lot of different feature, can be useful for different types of exam questions or survey question or polls. very simple to install and easy to custimize.

Question types and other features

As many questions as you like
Three types of questions
- Open
- Multiple Choice – select one
- Multiple Choice – select many
Customizable
Anti-Cheating support
Spoilers On/Off – New in v0.2.1