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What is crontab? Actually it is called 'cron daemon'. Cron is an automatic task machine. You will use it on your Unix or Linux operating systems for doing some tasks at specific intervals with out your intervention every time. You set the clock and forget. The cron daemon runs the work for you....
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Introduction A really cool feature that web designers overlook is the use of the .htaccess file. Simply put, whenever you see a custom error page (404, 403, etc.), use server side includes, restrict IPs, load a default page, or do any host of events invisible to the user, you are probably going...
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What are torrent Torrents Torrents are P2P(Peer to Peer) software compatible files they are used to share files in P2P network environments. For running torrents you need to install a specialised P2P software. Torrents use a Protocols for transfer of files The Bit-Torrent protocol is...
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LAMP is acronym for Linux , Apache , MySql , PHP/Perl/Python(CGI)..Its a solution stack of opensource programmes and its a platform Wherein each component plays a specific and important role.. Components Linux - Linux Provides the basic Operating System and Environments Apache - Apache...
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RSS or Remote Site Syndication is an excellent marketing tool of the new Internet age which is basically syndicating content from another site. Websites have become very sophisticated and the demand for quality content is systematically increasing. Consumers have become very demanding in terms...
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I have been on many forums ( specially Digitalpoint ) and seen many people pay some bucks to get success tips on Adsense which kills the concept of forum and free knowledge. With this in mind, I thought it would be nice to have all the best tips that I have read / experimented over time and again...
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Errors on the Internet, and those annoying error messages, occur quite frequently -- and can be quite frustrating, especially if you do not know the difference between a 404 error and a 502 error. Many times they have more to do with the Web servers you're trying to access rather than something...
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What is a cookie? Sometimes it becomes necessary to track certain user details like (No. Of Visits, names, last visit, etc). The client machine stores such information and sends it to the web server whenever there is a request. Cookies data are sent along with the HTTP headers. You can look at...
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Introduction RSS is one the hottest technologies at the moment, and even big web publishers (such as the New York Times) are getting into RSS as well. However, there are still a lot of websites that do not have RSS feeds. If you still want to be able to check those websites in your favourite...
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SSL stands for secure socket layer. SSL Certificate is necessary to protect your ecommerce website. However, there are various types of SSL certificates available and you need to choose which one is good for you. Domain validation SSL Certificate is very fast in issuing. You can be owner of...
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There are now several code obfuscation tools which will not really comprehensively "obscure" source code but somehow retrievably "crunch" it. This is not ideal but it is worthwhile nonetheless as it makes source sifting slow and painful for script kiddies/crackers. There are white space removers,...
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Introduction There's been a lot of publicity about pop-up windows, and most of it hasn't exactly been rave reviews. But it hasn't always been this way. In fact, pop-up windows were a positive component in the beginning. Created long before tabbed browsers, their purpose was to present...
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All of us have often encountered a "human" validation on various sites known as CAPTCHA, these are intended for bots - automatic programs - which crawl through websites and make comments, fill up contact forms etc. with the intention of marketing products, gaining backlinks, etc. The general...
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The latest version of HTML, viz. HTML5 brings in a lot of improvements & new feautres, and amongst those is the important one - form elements. HTML5 help you provide a rich user experience and layout with these new form elements. Although HTML5 is far from being useful to the mass and only the...
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In today's internet of JavaScript rich UI, it's sometimes very important to know the browser/platform user is using for browsing your site so that you can change the content dynamically according to the browser or the platform. Many sites are already working with this, like Firefox's official...
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Web Storage also known as DOM storage is web application technology which allows storage of data inside a web browser. It is similar to storing data in cookies but the capacity is huge, but unlike cookies no stored data is sent over to the server with each request. Web storage can store both...
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URL Encoding also known as Percent-encoding is the way to encode data passed in an URI (Uniform Resource Identifier), this system is used to convert special characters to hex form prefixed with a % sign, and prevents broken URLs. An encoded URL will look like the following: ...
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Ruby has become quite popular these days for writing maintenance & monitoring scripts, and a feature many of these kinds of scripts require is tracking files & directories for changes. Ruby has a few gems which let you accomplish this task easily, the one we are going to discuss about is...
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Minifying JavaScript and CSS reduces their file sizes considerably, which is accomplished by removing comments, unwanted newlines, space & tab characters, in more advanced cases long variable names are renamed into smaller ones and all the occurrences of the variable name is updated in the script -...
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We will use Amazon Linux AMI an the instructions are according to Amazon Linux AMI but I don't think they would vary too much for other Linux kernels. Step 1: Getting EC2 Instance Up and Running First Get Started With Amazon EC2 Instance and then Launch your Amazon EC2 Instance. Next is to...
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