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117 lines
5.7 KiB
HTML
117 lines
5.7 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1988-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Introduction and Notation (Debugging with GDB)</title>
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<meta name="description" content="Introduction and Notation (Debugging with GDB)">
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<meta name="keywords" content="Introduction and Notation (Debugging with GDB)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Command-Line-Editing.html#Command-Line-Editing" rel="up" title="Command Line Editing">
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<link href="Readline-Interaction.html#Readline-Interaction" rel="next" title="Readline Interaction">
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<link href="Command-Line-Editing.html#Command-Line-Editing" rel="prev" title="Command Line Editing">
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<style type="text/css">
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a.summary-letter {text-decoration: none}
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kbd {font-style: oblique}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Introduction-and-Notation"></a>
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<div class="header">
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<p>
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Next: <a href="Readline-Interaction.html#Readline-Interaction" accesskey="n" rel="next">Readline Interaction</a>, Up: <a href="Command-Line-Editing.html#Command-Line-Editing" accesskey="u" rel="up">Command Line Editing</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Introduction-to-Line-Editing"></a>
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<h3 class="section">32.1 Introduction to Line Editing</h3>
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<p>The following paragraphs describe the notation used to represent
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keystrokes.
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</p>
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<p>The text <kbd>C-k</kbd> is read as ‘Control-K’ and describes the character
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produced when the <tt class="key">k</tt> key is pressed while the Control key
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is depressed.
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</p>
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<p>The text <kbd>M-k</kbd> is read as ‘Meta-K’ and describes the character
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produced when the Meta key (if you have one) is depressed, and the <tt class="key">k</tt>
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key is pressed.
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The Meta key is labeled <tt class="key">ALT</tt> on many keyboards.
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On keyboards with two keys labeled <tt class="key">ALT</tt> (usually to either side of
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the space bar), the <tt class="key">ALT</tt> on the left side is generally set to
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work as a Meta key.
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The <tt class="key">ALT</tt> key on the right may also be configured to work as a
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Meta key or may be configured as some other modifier, such as a
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Compose key for typing accented characters.
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</p>
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<p>If you do not have a Meta or <tt class="key">ALT</tt> key, or another key working as
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a Meta key, the identical keystroke can be generated by typing <tt class="key">ESC</tt>
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<em>first</em>, and then typing <tt class="key">k</tt>.
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Either process is known as <em>metafying</em> the <tt class="key">k</tt> key.
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</p>
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<p>The text <kbd>M-C-k</kbd> is read as ‘Meta-Control-k’ and describes the
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character produced by <em>metafying</em> <kbd>C-k</kbd>.
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</p>
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<p>In addition, several keys have their own names. Specifically,
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<tt class="key">DEL</tt>, <tt class="key">ESC</tt>, <tt class="key">LFD</tt>, <tt class="key">SPC</tt>, <tt class="key">RET</tt>, and <tt class="key">TAB</tt> all
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stand for themselves when seen in this text, or in an init file
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(see <a href="Readline-Init-File.html#Readline-Init-File">Readline Init File</a>).
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If your keyboard lacks a <tt class="key">LFD</tt> key, typing <tt class="key">C-j</tt> will
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produce the desired character.
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The <tt class="key">RET</tt> key may be labeled <tt class="key">Return</tt> or <tt class="key">Enter</tt> on
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some keyboards.
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</p>
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<hr>
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<div class="header">
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<p>
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Next: <a href="Readline-Interaction.html#Readline-Interaction" accesskey="n" rel="next">Readline Interaction</a>, Up: <a href="Command-Line-Editing.html#Command-Line-Editing" accesskey="u" rel="up">Command Line Editing</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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</body>
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</html>
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