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	<title>silzenna.net &#187; bash</title>
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	<description>Sito personale di Silvio Zennaro, Dottore Magistrale in Informatica</description>
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		<title>MAC: creare zip files da terminale</title>
		<link>http://www.silzenna.net/2009/03/08/mac-creare-zip-files-da-terminale/</link>
		<comments>http://www.silzenna.net/2009/03/08/mac-creare-zip-files-da-terminale/#comments</comments>
		<pubDate>Sun, 08 Mar 2009 19:51:57 +0000</pubDate>
		<dc:creator>silzenna</dc:creator>
				<category><![CDATA[Tips]]></category>
		<category><![CDATA[bash]]></category>
		<category><![CDATA[mac]]></category>

		<guid isPermaLink="false">http://www.silzenna.net/?p=179</guid>
		<description><![CDATA[L'azione del finder comprimi crea fastidiosi file nascosti all'interno dell'archivio che fanno aumentare la dimensione finale, meglio il comando bash zip.]]></description>
			<content:encoded><![CDATA[<p>L&#8217;azione del finder &#8220;comprimi&#8221; viene utilizzata per la creazione di archivi zip. Purtroppo tale funzione crea fastidiosi file nascosti all&#8217;interno dell&#8217;archivio che oltretutto fanno aumentare la dimensione finale dell&#8217;archivio.<br />
Una valida alternativa consiste nel comando bash zip. Un valido e semplice esempio di utilizzo, lanciato dal terminale:</p>
<pre name="code" class="py">zip -r -q -9 Archivio.zip ./</pre>
<p>dove l&#8217;opzione -r viene utilizzata per comprimere ricorsivamente le directory, -q per eseguire la compressione in &#8220;quite mode&#8221; omettendo cioè messaggi e commenti e -9 indica il massimo livello di compressione possibile.</p>
<p>Per il processo inverso, ovvero per decomprimere un archivio da terminale, basta semplicemente invocare il comand <em>unzip</em>:</p>
<pre name="code" class="py">unzip -q Archivio.zip</pre>
<p>dove in questo caso l&#8217;opzione -q viene usata per omettere la stampa dei file estratti dall&#8217;archivio (utile in caso di archivi con molti file in quanto velocizza l&#8217;operazione di estrazione).</p>


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		</item>
		<item>
		<title>MAC: eseguire azioni automatiche all&#8217;avvio del terminale</title>
		<link>http://www.silzenna.net/2009/03/07/mac-eseguire-azioni-automatiche-allavvio-del-terminale/</link>
		<comments>http://www.silzenna.net/2009/03/07/mac-eseguire-azioni-automatiche-allavvio-del-terminale/#comments</comments>
		<pubDate>Sat, 07 Mar 2009 09:33:42 +0000</pubDate>
		<dc:creator>silzenna</dc:creator>
				<category><![CDATA[Tips]]></category>
		<category><![CDATA[bash]]></category>
		<category><![CDATA[mac]]></category>
		<category><![CDATA[terminale]]></category>

		<guid isPermaLink="false">http://www.silzenna.net/?p=176</guid>
		<description><![CDATA[Per eseguire diversi comandi in maniera automatica all'avvio di un terminale su mac occorre aprire il terminale e creare il file .profile all'interno della propria home]]></description>
			<content:encoded><![CDATA[<p>Per eseguire diversi comandi in maniera automatica all&#8217;avvio di un terminale su mac occorre aprire il terminale e creare il file .profile all&#8217;interno della propria home:</p>
<pre name="code" class="py">touch .profile</pre>
<p>All&#8217;interno di tale file si dovranno inserire tutti i comandi (uno per riga) che si vuole vengano eseguiti all&#8217;avvio della shell bash. Nel nostro esempio, per definire il comando <strong>ll</strong> scriveremo:</p>
<pre name="code" class="py">echo 'alias ll="ls -lG"' &gt;&gt; .profile</pre>
<p>quindi riavviare il terminale per applicare le modifiche.</p>
<p>Nell&#8217;esempio l&#8217;opzione -l viene utilizzata per stampare i file uno per riga, mentre l&#8217;opzione -G per colorare l&#8217;output (simile all&#8217;opzione &#8211;color=auto della bash linux).</p>


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		<title>Rimuovere file temporanei ricorsivamente all&#8217;interno di una directory</title>
		<link>http://www.silzenna.net/2009/03/05/rimuovere-file-temporanei-ricorsivamente-allinterno-di-una-directory/</link>
		<comments>http://www.silzenna.net/2009/03/05/rimuovere-file-temporanei-ricorsivamente-allinterno-di-una-directory/#comments</comments>
		<pubDate>Thu, 05 Mar 2009 12:07:23 +0000</pubDate>
		<dc:creator>silzenna</dc:creator>
				<category><![CDATA[Tips]]></category>
		<category><![CDATA[bash]]></category>
		<category><![CDATA[file temporanei]]></category>
		<category><![CDATA[find]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[mac]]></category>
		<category><![CDATA[rm]]></category>

		<guid isPermaLink="false">http://www.silzenna.net/?p=169</guid>
		<description><![CDATA[Comando per la rimozione dei file temporanei ricorsivamente all'interno di una cartella]]></description>
			<content:encoded><![CDATA[<p>Capita spesso che alcune applicazioni creino sul nostro computer fastidiosi file temporanei che molto spesso a nostra insaputa risultano utilissimi. Noi però non li sopportiamo e vorremmo cancellarli con facilità.</p>
<p>Come fare però per eliminare i file automaticamente in tutte le sottocartelle senza dover necessariamente percorrere ogni singola directory manualmente?</p>
<p>Questa riga di codice fa al caso nostro:</p>
<pre name="code" class="py">find ./ -name &quot;pattern_da_individuare&quot; -exec rm &quot;{}&quot; \; -print</pre>
<p>dove pattern_da_individuaredovrà essere sostituito con l&#8217;indicazione del file temporaneo da eliminare. Ad esempio, per eliminare tutti i file temporanei dil cui nome inizia con ._ (come per i file generati dal finder del mac alla (de)compressione di files o directory) eseguiremo:</p>
<pre name="code" class="py">find ./ -name &quot;._*&quot; -exec rm &quot;{}&quot; \; -print</pre>
<p>Nel caso volessimo estendere la ricera ed eliminare anche i file che iniziamo con .tmp eseguiremo:</p>
<pre name="code" class="py">find ./ -name &quot;._*&quot; -exec rm &quot;{}&quot; \; -print -or -name &quot;.tmp*&quot; -exec rm {} \; -print</pre>
<p>Il comando bash in questione è compatibile con i sistemi MAC e LINUX, eseguito direttamente da terminale.</p>


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		<title>MAC Tip: Finder, visualizzare i file nascosti</title>
		<link>http://www.silzenna.net/2009/03/04/mac-tip-finder-visualizzare-i-file-nascosti/</link>
		<comments>http://www.silzenna.net/2009/03/04/mac-tip-finder-visualizzare-i-file-nascosti/#comments</comments>
		<pubDate>Wed, 04 Mar 2009 22:36:24 +0000</pubDate>
		<dc:creator>silzenna</dc:creator>
				<category><![CDATA[Tips]]></category>
		<category><![CDATA[bash]]></category>
		<category><![CDATA[finder]]></category>
		<category><![CDATA[mac]]></category>

		<guid isPermaLink="false">http://www.silzenna.net/?p=160</guid>
		<description><![CDATA[Mac Tips: Come visualizzare e nascondere i file nascosti nel finder]]></description>
			<content:encoded><![CDATA[<p style="text-align: center;"><img class="size-full wp-image-159 aligncenter" title="Apple Logo" src="http://www.silzenna.net/wp-content/uploads/2009/03/apple.png" alt="Apple Logo" width="106" height="127" /></p>
<p style="text-align: left;">Per abilitare la visualizzazione di file nascosti all&#8217;interno del finder, che di default è disabilitata, basta semplicemente aprire il terminale e digitare la seguente riga di codice:</p>
<pre name="code" class="py">defaults write com.apple.finder AppleShowAllFiles -bool true</pre>
<p>il terminale memorizzerà la nuova impostazione silenziosamente (nessun output dovrebbe comparire).</p>
<p>Ora, per visualizzare i file nascosti occorre semplicemente riavviare il finder.</p>
<p>Per effettuare l&#8217;operazione inversa, ovvero per nascondere i file nascosti dal finder occorre invece eseguire il seguente comando da terminale:</p>
<pre name="code" class="py">defaults write com.apple.finder AppleShowAllFiles -bool false</pre>
<p>quindi riavviare il finder per applicare la nuova impostazione</p>


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		<title>Bash: ottenere informazioni sulle dimensioni di una cartella</title>
		<link>http://www.silzenna.net/2009/02/03/bash-ottenere-informazioni-sulle-dimensioni-di-una-cartella/</link>
		<comments>http://www.silzenna.net/2009/02/03/bash-ottenere-informazioni-sulle-dimensioni-di-una-cartella/#comments</comments>
		<pubDate>Tue, 03 Feb 2009 09:25:36 +0000</pubDate>
		<dc:creator>silzenna</dc:creator>
				<category><![CDATA[Tips]]></category>
		<category><![CDATA[bash]]></category>
		<category><![CDATA[hosting web]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[mac]]></category>
		<category><![CDATA[terminale]]></category>

		<guid isPermaLink="false">http://www.silzenna.net/?p=135</guid>
		<description><![CDATA[Per ottenere informazioni sulla dimensione totale di una cartella e di tutte le sottocartelle presenti al suo interno occorre da terminale entrare nella cartella da esaminare e digitare il comando du -h]]></description>
			<content:encoded><![CDATA[<p>Per ottenere informazioni sulla dimensione totale di una cartella e di tutte le sottocartelle presenti al suo interno occorre da terminale entrare nella cartella da esaminare e digitare il comando:</p>
<pre name="code" class="py">du -h</pre>
<p>o in alternativa dalla directory superiore</p>
<pre name="code" class="py">du -h nome_cartella</pre>
<p>Tale comando ritornerà una lista ricorsiva di tutte le cartelle e sottocartelle con associate le dimensioni. L&#8217;opzione -h viene utilizzato per ritornare un&#8217;informazione maggiormente &#8220;human readable&#8221;.</p>


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