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NCDU: NCurses Disk Usage // Hagfi.sh
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<li><a href="#comparison-with-du">Comparison with &lsquo;du&rsquo;</a></li>
<li><a href="#options">Options</a></li>
<li><a href="#advanced-ncdu">Advanced ncdu</a>
<ul>
<li><a href="#json-for-development">JSON for development</a></li>
<li><a href="#store-result">Store result</a></li>
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<section class="post">
<h1 class="post-title">
<a href="/tools/ncdu/">NCDU: NCurses Disk Usage</a>
</h1>
<h3 class="post-subtitle">
</h3>
<span class="post-date">
<span class="post-date-day"><sup>17</sup></span><span class="post-date-separator">/</span><span class="post-date-month">Sep</span> <span class="post-date-year">2018</span>
</span>
<span class="post-author-single">By <a class="post-author" target="">Kristof Vandam</a></span>
<div class="post-categories">
<a class="post-category post-category-tools" href="https://blog.hagfi.sh//categories/tools">tools</a>
<a class="post-category post-category-administration" href="https://blog.hagfi.sh//categories/administration">administration</a>
</div>
<p>ncdu is a command line tool to scan and calculate directory and file sizes.</p>
<h2 id="comparison-with-du">Comparison with &lsquo;du&rsquo;</h2>
<p>While the initial scan is about the same as du, ncdu keeps the results in memory. This
can become handy when investigating the storage hog. You can compare the already cached
results immediately with a <em>(r)</em> escan.</p>
<p>Also navigation is a breese. <em>ncdu</em> creates a interactive session where the arrow keys are
used to open and close directories.</p>
<h2 id="options">Options</h2>
<p>ncdu is not bloated with options, but each of these are useful and easy to remember. All these are
used inside the interactive session.</p>
<table>
<thead>
<tr>
<th>Key</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>up, k</td>
<td>Move cursor up</td>
</tr>
<tr>
<td>down, j</td>
<td>Move cursor down</td>
</tr>
<tr>
<td>right/enter</td>
<td>Open selected directory</td>
</tr>
<tr>
<td>left, &lt;, h</td>
<td>Open parent directory</td>
</tr>
<tr>
<td>n</td>
<td>Sort by name</td>
</tr>
<tr>
<td>s</td>
<td>Sort by size</td>
</tr>
<tr>
<td>C</td>
<td>Sort by items</td>
</tr>
<tr>
<td>d</td>
<td>Delete selected file or directory</td>
</tr>
<tr>
<td>t</td>
<td>Toggle dirs before files when sorting</td>
</tr>
<tr>
<td>g</td>
<td>Show percentage and/or graph</td>
</tr>
<tr>
<td>a</td>
<td>Toggle between apparent size and disk usage</td>
</tr>
<tr>
<td>c</td>
<td>Toggle display of child item counts</td>
</tr>
<tr>
<td>e</td>
<td>Show/hide hidden or excluded files</td>
</tr>
<tr>
<td>i</td>
<td>Show information about selected item</td>
</tr>
<tr>
<td>r</td>
<td>Recalculate the current directory</td>
</tr>
<tr>
<td>b</td>
<td>Spawn shell in current directory</td>
</tr>
<tr>
<td>q</td>
<td>Quit ncdu</td>
</tr>
</tbody>
</table>
<h2 id="advanced-ncdu">Advanced ncdu</h2>
<h3 id="json-for-development">JSON for development</h3>
<pre tabindex="0"><code class="language-.language-command" data-lang=".language-command">ncdu -x / -o- | jq
</code></pre><blockquote>
</blockquote>
<ul>
<li><strong>-x</strong> chose directory &lsquo;/&rsquo;</li>
<li><strong>-o-</strong> output to stdout</li>
</ul>
<p>Will create a JSON object of the current directory and all his subdirectories. This can come
handy for developing or generating reports.</p>
<h3 id="store-result">Store result</h3>
<pre tabindex="0"><code class="language-.language-command" data-lang=".language-command">ncdu -0xo- / | gzip &gt; scan.gz
</code></pre><blockquote>
</blockquote>
<ul>
<li><strong>-0</strong> surpress unwanted output</li>
<li><strong>-x</strong> chose directory &lsquo;/&rsquo;</li>
<li><strong>-o-</strong> output to stdout</li>
</ul>
<h3 id="use-stored-result">Use stored result</h3>
<pre tabindex="0"><code class="language-.language-command" data-lang=".language-command">zcat scan.gz | ncdu -f-
</code></pre><blockquote>
</blockquote>
<ul>
<li><strong>-f</strong> read from stdin</li>
</ul>
<h2 id="author">Author</h2>
<p><a href="https://dev.yorhel.nl/ncdu/man">Official Website</a></p>
<div class="tags-list">
<span class="dark-red">Tags</span><span class="decorative-marker">//</span>
<a class="post-tag post-tag-du" href="https://blog.hagfi.sh//tags/du">du</a>,
<a class="post-tag post-tag-ncdu" href="https://blog.hagfi.sh//tags/ncdu">ncdu</a>,
<a class="post-tag post-tag-directory" href="https://blog.hagfi.sh//tags/directory">directory</a>,
<a class="post-tag post-tag-size" href="https://blog.hagfi.sh//tags/size">size</a>,
<a class="post-tag post-tag-inventory" href="https://blog.hagfi.sh//tags/inventory">inventory</a>,
</div>
<div class="paging">
<span class="paging-label">More Reading</span>
<div class="paging-newer">
<span class="dark-red">Newer</span><span class="decorative-marker">//</span>
<a class="paging-link" href="/development/live-search-with-hugo/">Live Search With HUGO</a>
</div>
<div class="paging-older">
<span class="dark-red">Older</span><span class="decorative-marker">//</span>
<a class="paging-link" href="/administration/toubles-with-interfaces-after-clone/">Troubles with interfaces after a VM clone</a>
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