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<a name="GDB-Commands"></a>
<h2 class="chapter">3 <small>GDB</small> Commands</h2>

<p>You can abbreviate a <small>GDB</small> command to the first few letters of the command
name, if that abbreviation is unambiguous; and you can repeat certain
<small>GDB</small> commands by typing just <tt class="key">RET</tt>.  You can also use the <tt class="key">TAB</tt>
key to get <small>GDB</small> to fill out the rest of a word in a command (or to
show you the alternatives available, if there is more than one possibility).
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<tr><td align="left" valign="top">&bull; <a href="Command-Syntax.html#Command-Syntax" accesskey="1">Command Syntax</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">How to give commands to <small>GDB</small>
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<tr><td align="left" valign="top">&bull; <a href="Command-Settings.html#Command-Settings" accesskey="2">Command Settings</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">How to change default behavior of commands
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<tr><td align="left" valign="top">&bull; <a href="Completion.html#Completion" accesskey="3">Completion</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Command completion
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<tr><td align="left" valign="top">&bull; <a href="Command-Options.html#Command-Options" accesskey="4">Command Options</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Command options
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<tr><td align="left" valign="top">&bull; <a href="Command-aliases-default-args.html#Command-aliases-default-args" accesskey="5">Command aliases default args</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Automatically prepend default arguments to user-defined aliases
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<tr><td align="left" valign="top">&bull; <a href="Help.html#Help" accesskey="6">Help</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">How to ask <small>GDB</small> for help
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