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<h2 class="chapter">25 <span class="sc">gdb</span> Text User Interface</h2>
<p><a name="index-TUI-1956"></a><a name="index-Text-User-Interface-1957"></a>
<ul class="menu">
<li><a accesskey="1" href="TUI-Overview.html#TUI-Overview">TUI Overview</a>: TUI overview
<li><a accesskey="2" href="TUI-Keys.html#TUI-Keys">TUI Keys</a>: TUI key bindings
<li><a accesskey="3" href="TUI-Single-Key-Mode.html#TUI-Single-Key-Mode">TUI Single Key Mode</a>: TUI single key mode
<li><a accesskey="4" href="TUI-Commands.html#TUI-Commands">TUI Commands</a>: TUI-specific commands
<li><a accesskey="5" href="TUI-Configuration.html#TUI-Configuration">TUI Configuration</a>: TUI configuration variables
</ul>
<p>The <span class="sc">gdb</span> Text User Interface (TUI) is a terminal
interface which uses the <code>curses</code> library to show the source
file, the assembly output, the program registers and <span class="sc">gdb</span>
commands in separate text windows. The TUI mode is supported only
on platforms where a suitable version of the <code>curses</code> library
is available.
<p><a name="index-g_t_0040value_007bGDBTUI_007d-1958"></a>The TUI mode is enabled by default when you invoke <span class="sc">gdb</span> as
either &lsquo;<samp><span class="samp">gdbtui</span></samp>&rsquo; or &lsquo;<samp><span class="samp">gdb -tui</span></samp>&rsquo;.
You can also switch in and out of TUI mode while <span class="sc">gdb</span> runs by
using various TUI commands and key bindings, such as <kbd>C-x C-a</kbd>.
See <a href="TUI-Keys.html#TUI-Keys">TUI Key Bindings</a>.
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