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What is a File Extension?
A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the operating system to know what type of file it is and what program to run when you double-click on it. There are no particular rules regarding how an extension should be formatted other than it must begin with a period and have at least one character after it. For the most part, file extensions consist of three characters, which are typically letters or digits, that textually represent the type of file it is. Some examples of file extensions include .txt, .mp3, .jpg, and .gz, which represent text files, mp3 files, jpeg image files, and files compressed with the gzip program. As you can see, the actual extension name gives clues as to the type of file it is.
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Resizing and Adding Partitions using GParted Live
This tutorial focuses on using GParted, or Gnome Partition Editor, a free and open source partition editor. To use GParted, you must first download the CD Image file (.iso file) of GParted Live for this program. Instructions on where to find and how to burn the GParted ISO file are covered in the Preparation step. In this tutorial we will be using Microsoft Windows XP for certain steps. If you use a different version of Windows, some of these steps and screens may be a bit different.
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Using man to get help in Linux and Unix
Many users who try Linux for the first time can get confused easily as their is no readily apparent help system available to them. As Windows programs are typically graphical in nature, it is not too hard to find the help menu for that particular program. Linux, on the other hand, has thousands of very useful programs that are run from the command line and therefore it may not be easy to find the help for that particular programs. Thankfully for us, developers created the program called man. Man, which stands for manual, is a program that can be used to view the help or manual page for the thousands of individual programs found in Linux or Unix.
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Introduction to mounting filesystems in Linux
A filesystem is a way that an operating system organizes files on a disk. These filesystems come in many different flavors depending on your specific needs. For Windows, you have the NTFS, FAT, FAT16, or FAT32 filesystems. For Macintosh, you have the HFS filesystem and for Linux you have more filesystems than we can list in this tutorial. One of the great things about Linux is that you have the ability to access data stored on many different file systems, even if these filesystems are from other operating systems.
