Linux people like to claim that directories are really just another type of file. This statement can be misleading. We saw in a previous article that you create a file using a file editor. We will see later in this article how to create a directory.

So just what is a Linux directory? A directory is a collection that may include one or more directories, one or more files, or in fact be empty. You may think of a directory as a computerized file folder or loose-leaf notebook that contains dividers (themselves directories) and pages (files.) Just like a notebook page may not contain a divider, a Linux file may not contain a directory.

Up to now our comments about Linux directories hold for Windows directories as well. Now let’s take a look at some differences between these two systems. First come the naming conventions. Linux always distinguishes between lower-case and upper-case characters in directory names. Microsoft Windows does not. For example, Linux treats pay12june and Pay12june are as two different directories, as different as the directories pay12june and heighho. These directory names were used as file names in the previous article. While Linux does have some reserved directory and file names, in general one cannot tell by the name whether it is a file name or a directory name. So be careful. Linux helps you out here ‘ the ls command that lists the contents of a given directory usually displays files and directories in different colors.

Directories are hierarchical. They resemble a tree or a family tree. But unlike a tree (or Microsoft Windows) Linux has only one root. The root, designated as / lies at the top, rather than at the bottom, of the hierarchy. Right underneath the root directory you will find several subdirectories. For example, the /home directory is a child of / the root directory. The number and names of the first-level subdirectories vary from one version of Linux to another. For example, some Linux distributions include a /root directory while others do not. The /root directory (or subdirectory, both terms are used) is a child of /, the actual root directory.

The /home directory is an important directory. It is divided into subdirectories, one for each user. We like to work with Damn Small Linux, a free version of Linux that runs on the Windows desktop and requires only 50 Megabytes of disk space. Damn Small Linux automatically creates a user called dsl whose home directory is /home/dsl ; a working area essentially reserved for this user. All Linux versions subdivide the /home directory into user subdirectories according to this simple naming convention.

Linux provides several commands to process directories. For example, the mkdir command creates a directory. The rmdir command removes a directory, but in the simplest case only when it is empty. The cd command changes the working directory, the directory in which you are positioned. The pwd (print working directory) command displays (not prints) the working directory. Beginners should run this command often to reduce errors. For example, if you, the dsl user, think that you are positioned in the /home/dsl directory but in fact are positioned in the / directory you won’t be able save your files with a simple command. Why? Because you lack the requisite permission, the subject of our next article.

By: Levi Reiss

This article will not attempt to advocate the use of Linux over Windows or vice versa. I will try to present the differences and similarities between Linux and Windows in a fair manner.

Overview:

Both Linux and Windows (2000, NT, XP, Vista) are operating systems. Linux was inspired from Unix, while Windows was inspired from VMS.

While no single company “owns” Linux, Windows is owned by Microsoft. Various distributions (often referred to as “distros”) of Linux come from different companies (e.g. Red Hat, Novell SuSE, Mandrake etc.), while all Windows flavors (95, 98, 2000, XP, Vista) come from Microsoft.

Both Linux and Windows come in Desktop and Server editions.

Cost:

As far as cost is concerned, Linux is very cheap or free. I used the word “very cheap” for enterprise users. While anybody can download, install and use Linux, the distribution companies usually charge for technical support.
Windows is expensive. You first pay for the copy of the software and then again for the technical support if you ever want it.
There is another catch though; Windows enforces you to use a single copy on a single computer. This is not the case with Linux though, once you purchase Linux, you can run it on an unlimited number of computers. (more…)

The Basics of Linux & Windows : Linux (and its close relation Unix) and Windows 2000 (and its close cousin Windows NT) are types of software (known as operating systems) that web servers use to do the kind of things that web servers do. You do not need to know any real detail of either to make a decision as to which you need but here a few guidelines.

Just because you use a windows desktop PC doesn’t mean you have to opt for Windows web hosting (and the reverse is true as well). The operating system you use on your desktop has little to do with your choice of web hosts. As long as you understand how to use your FTP or web publishing software, your can use either operating system.

But what is important is that you know what you want your website to do and what you want to offer on it. This is what will ultimately help determine the type of web hosting that will work best for you. As mentioned earlier, interactive websites usually rely on ASP, PHP, or Perl type languages.

Linux Web Hosting or Windows 2000 Web Hosting ? Make your Choice !

When it comes to Web hosting, Linux has, for some time, been widely considered the best OS for Web servers. It’s typically found to be the most reliable, stable and efficient system and, as such, it’s commonly used for the demanding environment of Web and mail servers. Indeed,Most of the clients websites of aalpha NET runs on the Linux OS precisely because of this traditional stability.

The million-dollar question is what application are you looking to use for your hosting? Consider the tools and scripting languages you plan to use – if you use PHP, Perl or MySQL, Linux is the way forward. If apps are Microsoft-specific, then Windows is what you need.

If your site, like most web sites, is what might be termed “brochure-ware” then Linux servers are ideal. By brochure-ware I mean a site that offers the kind of information that in the past might have been provided on paper in the form of brochures, newsletters or data sheets. Brochure-ware sites will offer some interaction through enquiry forms and can certainly incorporate online purchasing and other routine e-commerce functions.

If however your site incorporates an online searchable database or interactive chat facilities then Windows 2000 or NT will be a better bet in most cases. It will cost a bit more but you’ll get that back in reduced development time and simply better functionality.

The following are the advantages of using Linux based web server compared to Windows based web server :

Stable: Linux/Unix operating systems has traditionally been believed to be very stable and robust. A web site housed on a Linux operating system will have very high up-time (of the order of 99.9%). Of course, other factors such as power supply, network admin skills, and network load etc. also matter when it comes to maintaining the system uptime.

Low cost of ownership: The Linux OS comes free of cost (or at very insignificant cost, usually cost of distribution). Also, it has full fledged server, and desk top applications that comes free along with the OS. These server applications (such as FTP, Web Server, DNS Server, File Server etc.) being free, are also very stable.

Ease of use : When it comes to web hosting, it is easy to host on Linux web servers. The process of uploading and hosting is almost same for both Linux and Windows web servers. If you want to use a Windows based tool such as Front Page for uploading a web site on to a Linux based web server, make sure that the Front Page extensions are enabled. This is only required if you are uploading using HTTP feature (http://www.yourwebsite.com) of Front Page. Front Page also makes it possible to upload a web site using FTP. You need to select ftp://www.yourwebsite.com for up loading using front page FTP option. Note that if you select “Front Page Extensions” during web site design, you must enable Front Page extensions on a Linux web server also. These days, all Linux web servers are coming with installable Front Page extensions, and this should pose no problem for hosting on a Linux platform.

You can use almost all types of file extensions (or scripts) when using Linux web server. Commonly, the following extensions are supported: .cgi, .html, .htm, .pl, .php, .shtml, .xml, and others. Basically it means that you can host web sites that use different types of server side scripts including .cgi, .pl, ..php, and .asp (with plug-in).

Easy to move between hosts : A web site designed to be hosted on a Linux based web server can be hosted on a Windows web server easily, where as the reverse is not always true.

Most widely used : Linux/Unix based web hosting is most widely used compared to Windows based web hosting.

Scalability : A web site is dynamic. Usually, a web site starts with a few pages of html and grows over a period of time to suit the customers requirements. It is preferable to design a web site keeping this requirements in mind. A web site designed for compatibility with a Linux/Unix based web server meets the scalability requirement easily without making any site wide design changes.

On the downside, Linux based web server is not fully compatible with Microsoft technologies. If you are using any specialized applications or VB for development of your web site, it is preferable to host with a Windows based web server.

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Thank You

By: Arpit Sharma