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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....
The possibilities of web graphics are only limited to the imagination - animation and sound can touch the senses of a viewer leaving a longer lasting impression. It has the power to invoke an emotion or excitement. Its amazing what one can do with these tools !!! 1) build brand awareness, 2)...
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...
SSH is the descendant of rsh and rlogin, which are non-encrypted programs for remote shell logins. Rsh and rlogin, like telnet, have a long lineage but now are outdated and insecure. However, these programs evolved a surprising number of nifty features over two decades of UNIX development, and the...
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,...
The Apache web server has a number of configuration options that are available to the server administrator. In a shared hosting environment, you don't have access to the main Apache configuration so you're stuck with the default configuration. However, it is possible to override some of the default...
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...
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...
HTTP is an abbreviated form of Hyper Text Transfer Protocol..As we all know HTTP set the foundations for internet and WWW ...I'll not go in much detail of its history, but I'll get straight to the topic of How HTTP works HTTP is a request response protocol to communicate asynchrnously...
FTP is a abbreviation of File Transfer Protocol , it is the main net work protocol used for downloading/uploading of files...From one host to another using a TCP based network like INTERNET.. FTP works on a principle of client-server model and uses data-connection between client and server..FTP...
SMTP stands for Simple Mail Transfer Protocol as the name suggest it is basically used for emails.. SMTP specified for outgoing mail uses and default sits on TCP Port 25..(Uses 587 in new versions) Electronic mail servers uses SMTP for send and receive emails while the User Client interface only...
In a network of computers, a Proxy (or a Proxy server) acts as an inter-mediator for relaying of requests from set of clients seeking resources from other set of servers. A Proxy generally while acting on the requests may filter the data based on specific requirement of the Proxy. Most web based...
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...
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...
If a webserver return "HTTP/1.x 404 Document Not Found" (or any other HTTP error), MSIE will display it's built in error message (which we all are quite acquainted to), not the custom error page if its smaller than 513 bytes. When you access Web pages from Internet Explorer 5.x and Internet...
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...
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 -...
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...
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...
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...