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<title>Linux and shell</title>


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    <section><h3 id="intro-su-sistemi-operativi">intro su sistemi operativi</h3>
<ul>
<li>cosa sono?</li>
<li>che fanno?</li>
</ul>
</section><section>
<h3 id="software-libero-kernel-distro">software libero, kernel, distro.</h3>
<ul>
<li><a href="https://it.wikipedia.org/wiki/Software_libero">Software Libero</a></li>
<li><a href="https://it.wikipedia.org/wiki/Distribuzione_Linux">Distribuzioni</a></li>
</ul>
</section><section>
<h3 id="come-si-installa-un-os-boot">Come si installa un OS? BOOT</h3>
</section><section>
<table>
<thead>
<tr>
<th>Marca</th>
<th>Tasto</th>
</tr>
</thead>
<tbody>
<tr>
<td>Acer</td>
<td>F12, F9, F2, Esc</td>
</tr>
<tr>
<td>Apple</td>
<td>Option</td>
</tr>
<tr>
<td>Asus</td>
<td>Esc</td>
</tr>
<tr>
<td>Dell</td>
<td>F12</td>
</tr>
<tr>
<td>HP</td>
<td>F9</td>
</tr>
<tr>
<td>Huawei</td>
<td>F12</td>
</tr>
<tr>
<td>Lenovo</td>
<td>F12</td>
</tr>
<tr>
<td>others…</td>
<td>F12, Esc</td>
</tr>
</tbody>
</table>
</section><section>
<h3 id="metodi-di-interazione-ui-gui-cli">metodi di interazione, UI, GUI, CLI</h3>
<p>Quando ci relazioniamo agli strumenti c&rsquo;e&rsquo; un linguaggio che usiamo per interagire con loro, questo modo di relazionarsi è la <u>User Interface</u>: permette alle persone (user) di interfacciarsi ai computer.
<a href="https://techlearningcollective.com/foundations/command-line-basics/commands-versus-buttons">link</a></p>
</section><section>
<h3 id="gui">GUI</h3>
<p>punta e clicca, pochissima espressività.</p>
<p>nelle gui devi manipolare gli oggetti a cui vuoi riferirti puntandoli direttamente, fisicamente.
siamo obbligati ad usare un dito, il puntatore. inoltre non puoi accedere a cio&rsquo; che non e&rsquo; mostrato.
se non si vede non puoi manipolarlo.</p>
</section><section>
<h3 id="cli">CLI</h3>
<p>Tutta l&rsquo;espressività e la potenza di un linguaggio naturale!</p>


<aside class="notes"><ul>
<li>esempio del ristorante, scelta del menu.</li>
<li>come si descrivono le operazioni, nella gui ci si mette un sacco a scrivere e a ripetere</li>
<li>per la cli e&rsquo; autoesplicativo quando si conosce il linguaggio, non c&rsquo;e&rsquo; ambiguita&rsquo; e&rsquo; deterministico</li>
</ul>
</aside>
</section><section>
<h3 id="cli-base">CLI base</h3>
<ul>
<li>tutto imperativo, si chiama command line appunto</li>
<li>ogni comando finisce con un invio</li>
<li>spesso i comandi necessitano argomenti</li>
</ul>
</section><section>
<h3 id="iniziamo">Iniziamo</h3>
<pre tabindex="0"><code>ls
</code></pre><p><a href="https://techlearningcollective.com/foundations/linux-journey/the-shell">link</a></p>
</section><section>
<h3 id="attributi">Attributi</h3>
<pre tabindex="0"><code>ls --help
ls --all
ls -t
</code></pre></section><section>
<h3 id="argomenti">Argomenti</h3>
<pre tabindex="0"><code>ls Musica
</code></pre></section><section>
<h3 id="autocompletamento">Autocompletamento</h3>
<p>Usa il TAB!</p>
</section><section>
<h4 id="help">Help</h4>
<pre tabindex="0"><code>man ls
</code></pre></section><section>
<h3 id="echo">echo</h3>
<pre tabindex="0"><code>echo ciao
</code></pre></section><section>
<h3 id="che-giorno-è">che giorno è</h3>
<pre tabindex="0"><code>???? 
</code></pre></section><section>
<h3 id="filesystem">Filesystem</h3>
<pre tabindex="0"><code>pwd
cd .
cd ..
cd ~
cd -
cd dir
</code></pre></section><section>
<h3 id="files">Files</h3>
<pre tabindex="0"><code>less
cat
</code></pre></section><section>
<h3 id="history">History</h3>
<p>su e giù</p>
<pre tabindex="0"><code>history
</code></pre><p>ctrl+r</p>
</section><section>
<h4 id="ancora-files-e-dirs">Ancora files e dirs</h4>
<pre tabindex="0"><code>cp
mv
rm
tree
mkdir
</code></pre></section><section>
<h4 id="cercare">Cercare</h4>
<pre tabindex="0"><code>find
grep
</code></pre></section><section>
<h4 id="redirect">Redirect</h4>
<pre tabindex="0"><code>echo 120g zucchero &gt; ricetta_tiramisu.txt
</code></pre><p>la &gt; è una redirezione, ci permette di cambiare dove finisce l&rsquo;output</p>
</section><section>
<h4 id="redirect-ii">Redirect II</h4>
<pre tabindex="0"><code>echo 120g zucchero &gt;&gt; ricetta_tiramisu.txt
</code></pre></section><section>
<h4 id="pipe">PIPE</h4>
<pre tabindex="0"><code>grep
sort
wc
tail
head
</code></pre></section>

  
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