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| <title>Debugging with GDB: Introduction and Notation</title> |
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| <a name="Introduction-and-Notation"></a> |
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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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| <a name="Introduction-to-Line-Editing"></a> |
| <h3 class="section">32.1 Introduction to Line Editing</h3> |
| |
| <p>The following paragraphs describe the notation used to represent |
| keystrokes. |
| </p> |
| <p>The text <kbd>C-k</kbd> is read as ‘Control-K’ and describes the character |
| produced when the <tt class="key">k</tt> key is pressed while the Control key |
| is depressed. |
| </p> |
| <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 <tt class="key">k</tt> |
| key is pressed. |
| The Meta key is labeled <tt class="key">ALT</tt> on many keyboards. |
| On keyboards with two keys labeled <tt class="key">ALT</tt> (usually to either side of |
| the space bar), the <tt class="key">ALT</tt> on the left side is generally set to |
| work as a Meta key. |
| The <tt class="key">ALT</tt> 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> |
| <p>If you do not have a Meta or <tt class="key">ALT</tt> key, or another key working as |
| a Meta key, the identical keystroke can be generated by typing <tt class="key">ESC</tt> |
| <em>first</em>, and then typing <tt class="key">k</tt>. |
| Either process is known as <em>metafying</em> the <tt class="key">k</tt> key. |
| </p> |
| <p>The text <kbd>M-C-k</kbd> is read as ‘Meta-Control-k’ and describes the |
| character produced by <em>metafying</em> <kbd>C-k</kbd>. |
| </p> |
| <p>In addition, several keys have their own names. Specifically, |
| <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 |
| 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 <tt class="key">LFD</tt> key, typing <tt class="key">C-j</tt> will |
| produce the desired character. |
| The <tt class="key">RET</tt> key may be labeled <tt class="key">Return</tt> or <tt class="key">Enter</tt> on |
| some keyboards. |
| </p> |
| <hr> |
| <div class="header"> |
| <p> |
| 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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