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+<page xmlns="http://projectmallard.org/1.0/"
+ type="guide" style="task"
+ id="overview">
+ <info>
+ <revision version="0.1" date="2013-01-10" status="draft"/>
+ <link type="guide" xref="index"/>
+
+ <credit type="author copyright">
+ <name>Sindhu S</name>
+ <email>sindhus@live.in</email>
+ <years>2013</years>
+ </credit>
+ <credit type="copyright editor">
+ <name>Ekaterina Gerasimova</name>
+ <email>kittykat3756@gmail.com</email>
+ <years>2013</years>
+ </credit>
+
+ <include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>
+
+ <desc>What is a terminal?</desc>
+ </info>
+
+ <title>Overview of a terminal</title>
+
+ <p><app>Terminal</app> is a terminal program for <gui>GNOME</gui>. The
+ following terms and their descriptions will help you to be familiar with
+ <app>Terminal</app> and its capabilities.</p>
+
+ <terms>
+ <item>
+ <title>A terminal</title>
+ <p>A terminal is a text input point in a computer that is also called
+ the Command Line Interface (CLI).</p>
+ </item>
+ <item>
+ <title>Physical terminals</title>
+ <p>IBM 3270, VT100 and many others are hardware terminals that are no
+ longer produced as physical devices. To emulate these terminals, there are
+ terminal emulators.</p>
+ </item>
+ <item>
+ <title>Terminal emulators</title>
+ <p>Emulation is the ability of a computer program to imitate another
+ program or device.</p>
+
+ <p>A terminal emulator, also called tty, is a software program that emulates
+ a video terminal in modern computers that use graphical user interfaces
+ and provide interactive access to applications that run only in the
+ command line environments. These applications may be running either on the
+ same machine or on a different one via <app>telnet</app>, <app>ssh</app>,
+ or <app>dial-up</app>.</p>
+ </item>
+ <item>
+ <title>VTE</title>
+ <p>Virtual Terminal Environment (VTE) is a terminal emulator which
+ emulates a text terminal inside a graphical user interface (GUI)
+ environment. <app>Terminal</app> is largely based on the <app>VTE</app>.
+ <app>VTE</app> has widgets that implement a fully functional terminal
+ emulator.</p>
+ </item>
+ <item>
+ <title>Shell</title>
+ <p>A <em>shell</em> is a program that provides an interface to invoke or
+ “launch” commands or another program inside a terminal. It also allows you
+ to view and browse the contents of directories. Popular shells include
+ <app>bash</app>, <app>zsh</app>, <app>fish</app>.</p>
+ </item>
+ <item>
+ <title>Escape Sequences</title>
+ <p>An escape sequence is a series of characters used to change the meaning
+ of data in a terminal. Escape sequences are used when a computer has only
+ single channel to send information back and forth. Escape sequences are
+ used to distinguish if data being sent is a command to be executed or
+ information to be stored and displayed.</p>
+ </item>
+
+ <item>
+ <title>Prompt</title>
+ <p>A prompt is also called a <em>command prompt</em>. It is a sequence of
+ characters used in the command line environment to indicate the readiness
+ of the shell to accept commands.</p>
+
+ <p>A prompt usually ends with the characters <sys>$</sys>, <sys>%</sys>,
+ <sys>#</sys> or <sys>&gt;</sys> and includes
+ information about the path of the present working directory. On Unix based
+ systems, it is common for the prompt to end in a <sys>$</sys> or
+ <sys>#</sys> character depending on the user role such as <sys>$</sys>
+ for user and <sys>#</sys> for superuser (also called <sys>root</sys>).
+ </p>
+ </item>
+ <item>
+ <title>Command</title>
+ <p>An input entered in the prompt to be executed is called a
+ <em>command</em>. It is a combination of the program name along with any
+ other additional parameters passed as flags to alter the execution of the
+ program.</p>
+ </item>
+ </terms>
+
+</page>