| <html lang="en"> |
| <head> |
| <title>Introduction and Notation - Debugging with GDB</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Debugging with GDB"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Command-Line-Editing.html#Command-Line-Editing" title="Command Line Editing"> |
| <link rel="next" href="Readline-Interaction.html#Readline-Interaction" title="Readline Interaction"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| Copyright (C) 1988-2019 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being ``Free Software'' and ``Free Software Needs |
| Free Documentation'', with the Front-Cover Texts being ``A GNU Manual,'' |
| and with the Back-Cover Texts as in (a) below. |
| |
| (a) The FSF's Back-Cover Text is: ``You are free to copy and modify |
| this GNU Manual. Buying copies from GNU Press supports the FSF in |
| developing GNU and promoting software freedom.'' |
| --> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="Introduction-and-Notation"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="Readline-Interaction.html#Readline-Interaction">Readline Interaction</a>, |
| Up: <a rel="up" accesskey="u" href="Command-Line-Editing.html#Command-Line-Editing">Command Line Editing</a> |
| <hr> |
| </div> |
| |
| <h3 class="section">32.1 Introduction to Line Editing</h3> |
| |
| <p>The following paragraphs describe the notation used to represent |
| keystrokes. |
| |
| <p>The text <kbd>C-k</kbd> is read as `Control-K' and describes the character |
| produced when the <k> key is pressed while the Control key |
| is depressed. |
| |
| <p>The text <kbd>M-k</kbd> is read as `Meta-K' and describes the character |
| produced when the Meta key (if you have one) is depressed, and the <k> |
| key is pressed. |
| The Meta key is labeled <ALT> on many keyboards. |
| On keyboards with two keys labeled <ALT> (usually to either side of |
| the space bar), the <ALT> on the left side is generally set to |
| work as a Meta key. |
| The <ALT> key on the right may also be configured to work as a |
| Meta key or may be configured as some other modifier, such as a |
| Compose key for typing accented characters. |
| |
| <p>If you do not have a Meta or <ALT> key, or another key working as |
| a Meta key, the identical keystroke can be generated by typing <ESC> |
| <em>first</em>, and then typing <k>. |
| Either process is known as <dfn>metafying</dfn> the <k> key. |
| |
| <p>The text <kbd>M-C-k</kbd> is read as `Meta-Control-k' and describes the |
| character produced by <dfn>metafying</dfn> <kbd>C-k</kbd>. |
| |
| <p>In addition, several keys have their own names. Specifically, |
| <DEL>, <ESC>, <LFD>, <SPC>, <RET>, and <TAB> all |
| stand for themselves when seen in this text, or in an init file |
| (see <a href="Readline-Init-File.html#Readline-Init-File">Readline Init File</a>). |
| If your keyboard lacks a <LFD> key, typing <C-j> will |
| produce the desired character. |
| The <RET> key may be labeled <Return> or <Enter> on |
| some keyboards. |
| |
| </body></html> |
| |
