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		<title>Il gioco dell&#8217;8</title>
		<link>http://www.tommyblue.it/2010/01/23/il-gioco-dell8/</link>
		<comments>http://www.tommyblue.it/2010/01/23/il-gioco-dell8/#comments</comments>
		<pubDate>Sat, 23 Jan 2010 15:18:00 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[Università]]></category>
		<category><![CDATA[Apprendimento]]></category>
		<category><![CDATA[Gioco dell'8]]></category>
		<category><![CDATA[Intelligenza Artificiale]]></category>
		<category><![CDATA[Reti neurali]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=795</guid>
		<description><![CDATA[Con Cosimo abbiamo terminato e consegnato le tesine riguardanti il gioco dell&#8217;8 e l&#8217;apprendimento con reti neurali per il corso di Intelligenza Artificiale del prof. Soda, le allego quindi per futura memoria: Tesina sul gioco dell&#8217;8 Tesina apprendimento &#8211; dataset diabetes Condividi questo post:]]></description>
			<content:encoded><![CDATA[<p>Con <a href="http://blogs.gnome.org/cosimoc/" target="_blank">Cosimo</a> abbiamo terminato e consegnato le tesine riguardanti il gioco dell&#8217;8 e l&#8217;apprendimento con reti neurali per il corso di Intelligenza Artificiale del prof. Soda, le allego quindi per futura memoria:</p>
<ul>
<li><a href="http://www.tommyblue.it/wp-content/uploads/2010/01/Tesina_otto_v1.1.pdf">Tesina sul gioco dell&#8217;8</a></li>
<li><a href="http://www.tommyblue.it/wp-content/uploads/2010/01/Tesina_diabetes_v1.0.pdf">Tesina apprendimento &#8211; dataset diabetes</a></li>
</ul>

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		<title>Unicorn: Rack HTTP server for Unix and fast clients</title>
		<link>http://www.tommyblue.it/2009/10/08/unicorn-rack-http-server-for-unix-and-fast-clients/</link>
		<comments>http://www.tommyblue.it/2009/10/08/unicorn-rack-http-server-for-unix-and-fast-clients/#comments</comments>
		<pubDate>Thu, 08 Oct 2009 10:16:28 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[How-To]]></category>
		<category><![CDATA[Informatica]]></category>
		<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[Passenger]]></category>
		<category><![CDATA[RubyOnRails]]></category>
		<category><![CDATA[Unicorn]]></category>
		<category><![CDATA[Webrick]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=635</guid>
		<description><![CDATA[Ho appena scoperto Unicorn, un server HTTP per applicazioni Rack (quindi anche Ruby on Rails) pensato per Kernel Unix o Unix-like e connessioni veloci a bassa latenza. Come suggerito dal sito client lenti dovrebbero essere serviti non da Unicorn ma da un proxy che si interfacci con Unicorn attraverso una connessione veloce ed effettui il [...]]]></description>
			<content:encoded><![CDATA[<p>Ho appena scoperto <a href="http://unicorn.bogomips.org/" target="_blank">Unicorn</a>, un server HTTP per applicazioni <a title="Rack provides a minimal interface between webservers supporting Ruby and Ruby frameworks" href="http://rack.rubyforge.org/" target="_blank">Rack</a> (quindi anche <a href="http://rubyonrails.org/" target="_blank">Ruby on Rails</a>) pensato per Kernel Unix o Unix-like e connessioni veloci a bassa latenza.<br />
Come suggerito dal sito client lenti dovrebbero essere serviti non da Unicorn ma da un proxy che si interfacci con Unicorn attraverso una connessione veloce ed effettui il buffering dei dati per poi gestire la connessione col client lento (ganzo! Ora devo scoprire come si fa&#8230;)</p>
<p>Installare Unicorn è semplicissimo, basta un:</p>
<pre>gem install unicorn</pre>
<p>dopodichè, se si tratta di un&#8217;applicazione Rails, basta andare nella RAILS_ROOT e lanciare:</p>
<pre>unicorn_rails</pre>
<p>Se invece si tratta di un&#8217;applicazione non Rails il comando è:</p>
<pre>unicorn</pre>
<p>In entrambi i casi Unicorn fa il binding della porta 8080 su tutte le interfacce (il comportamento è comunque configurabile).</p>
<p>L&#8217;impressione generale è una velocità molto maggiore sia di Webrick che di Passenger. Un confronto al volo su una pagina con un tabellone da un migliaio di righe dice:</p>
<pre>Webrick =&gt; 6131ms
Unicorn =&gt; 5698ms</pre>
<p>Quindi circa <strong>8%</strong> in meno.</p>
<p>Prossimamente approfondirò l&#8217;argomento :-)</p>

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		<title>Ancora una settimana di attesa per Fedora 11</title>
		<link>http://www.tommyblue.it/2009/05/29/ancora-una-settimana-di-attesa-per-fedora-11/</link>
		<comments>http://www.tommyblue.it/2009/05/29/ancora-una-settimana-di-attesa-per-fedora-11/#comments</comments>
		<pubDate>Fri, 29 May 2009 10:14:09 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[Informatica]]></category>
		<category><![CDATA[Riflessioni]]></category>
		<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[debian]]></category>
		<category><![CDATA[fedora]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=456</guid>
		<description><![CDATA[Mentre Fedora 10 batte i diretti concorrenti in un interessante confronto basato su apparenza, facilità d&#8217;uso, strumenti di amministrazione, gestione pacchetti, sicurezza, livello di supporto, il rilascio di Fedora 11 viene rimandato di un&#8217;altra settimana a causa di questo bug in Anaconda. Premesso che sono d&#8217;accordo con le motivazioni che hanno portato a far slittare [...]]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft size-full wp-image-457" title="Strong ant" src="http://www.tommyblue.it/wp-content/uploads/2009/05/strong_ant_by_outlawsammy.jpg" alt="Strong ant" width="250" height="167" />Mentre Fedora 10 batte i diretti concorrenti in <a href="http://www.maximumpc.com/article/features/theres_way_more_linux_ubuntu_8_distros_compared">un interessante confronto</a> basato su <strong>apparenza, facilità d&#8217;uso, strumenti di amministrazione, gestione pacchetti, sicurezza, livello di supporto</strong>, il rilascio di Fedora 11 <a href="https://www.redhat.com/archives/fedora-announce-list/2009-May/msg00011.html">viene rimandato di un&#8217;altra settimana</a> a causa di <a href="https://bugzilla.redhat.com/show_bug.cgi?id=500808">questo bug</a> in Anaconda.</p>
<p>Premesso che sono d&#8217;accordo con le motivazioni che hanno portato a far slittare il rilascio di una settimana, mi imbarazza un po&#8217; vedere il banner del countdown del rilascio di Fedora 11 <strong>salire anziche&#8217; scendere</strong>. E quindi non posso che essere d&#8217;accordo con Felipe <a href="http://pollycoke.net/2009/05/20/fedora-11-in-ritardo-causa-sintomo-e-cura/">quando afferma</a> che il modello a rilasci fissi sia quantomeno imperfetto. Insomma, tutto sommato mi piace l&#8217;idea un po&#8217; Debian-style di rilasciare una versione solo quando e&#8217; pronta, sempre che non ci vogliano tre anni prima di decidersi a fare il passo&#8230;</p>

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		<title>Moblin 2.0 beta su Acer Aspire One</title>
		<link>http://www.tommyblue.it/2009/05/21/moblin-20-beta-su-acer-aspire-one/</link>
		<comments>http://www.tommyblue.it/2009/05/21/moblin-20-beta-su-acer-aspire-one/#comments</comments>
		<pubDate>Thu, 21 May 2009 21:29:35 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[Informatica]]></category>
		<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[aspire one]]></category>
		<category><![CDATA[moblin]]></category>
		<category><![CDATA[netbook]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=426</guid>
		<description><![CDATA[Sempre alla ricerca di una distribuzione adatta al mio netbook (sembro essere uno dei pochi che vuole usare un netbook come tale e non come un notebook), mi sono imbattuto in questo video che mostra le potenzialità di Moblin: Moblin è una distribuzione Linux (basata su Fedora o simili) riadattata per i netbook (in particolare [...]]]></description>
			<content:encoded><![CDATA[<p>Sempre alla ricerca di una distribuzione adatta al mio netbook (sembro essere uno dei pochi che vuole usare un netbook come tale e non come un notebook), mi sono imbattuto in questo video che mostra le potenzialità di Moblin:</p>
<p style="text-align: center;">
<object width="425" height="349" data="http://www.youtube.com/v/vsCpIeLLoT8&amp;rel=0&amp;border=1&amp;color1=0xb1b1b1&amp;color2=0xcfcfcf&amp;hl=en&amp;feature=player_embedded&amp;fs=1" type="application/x-shockwave-flash"><param name="allowFullScreen" value="true" /><param name="src" value="http://www.youtube.com/v/vsCpIeLLoT8&amp;rel=0&amp;border=1&amp;color1=0xb1b1b1&amp;color2=0xcfcfcf&amp;hl=en&amp;feature=player_embedded&amp;fs=1" /><param name="allowfullscreen" value="true" /></object>
</p>
<p style="text-align: left;">Moblin è una distribuzione Linux (basata su Fedora o simili) riadattata per i netbook (in particolare con processore Atom). Si basa su Gnome con un tema fortemente modificato e un&#8217;interfaccia molto semplice.</p>
<p style="text-align: left;">Una volta scaricata l&#8217;immagine .img l&#8217;ho scritta su una penna usb utilizzando<a href="https://help.ubuntu.com/community/Installation/FromImgFiles" target="_blank"> la guida di Ubuntu</a> e l&#8217;ho lanciato. L&#8217;installazione è stata velocissima (non più di 15 minuti) e una volta riavviato l&#8217;impatto è stato senza dubbio ottimo. Si avvia molto velocemente e l&#8217;interfaccia è semplice e intuitiva.</p>
<p style="text-align: left;">L&#8217;idea che dà è di una distribuzione ancora piuttosto incompleta (non sono riuscito a trovare nè un client di posta nè il tasto per spegnerlo!) ma la mailing-list è molto attiva e per ora sono deciso a non disinstallarlo ma ad approfondire il nostro rapporto :)</p>

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		<title>Come rendere l&#8217;Aspire One utilizzabile con Ubuntu 9.04</title>
		<link>http://www.tommyblue.it/2009/05/05/come-rendere-laspire-one-utilizzabile-con-ubuntu-904/</link>
		<comments>http://www.tommyblue.it/2009/05/05/come-rendere-laspire-one-utilizzabile-con-ubuntu-904/#comments</comments>
		<pubDate>Tue, 05 May 2009 10:19:39 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[How-To]]></category>
		<category><![CDATA[Informatica]]></category>
		<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[acer]]></category>
		<category><![CDATA[aspire one]]></category>
		<category><![CDATA[jaunty]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[ubuntu]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=384</guid>
		<description><![CDATA[Finalmente ho tra le mani il netbook comprato a dicembre (mica male l&#8217;assitenza Acer, lo ha tenuto solo 5 mesi&#8230;) e ho deciso subito di togliere la sua distribuzione (una Fedora rimaneggiata col pregio di avviarsi veramente alla svelta) e provarci Ubuntu 9.04 &#8220;Jaunty Jackalope&#8221; in versione Remix. Nella pagina di download ci sono tutte [...]]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft" title="Acer Aspire One" src="http://www.tommyblue.it/wp-content/uploads/2009/03/acer_aspire_one_ita_2-300x237.jpg" alt="" width="300" height="237" />Finalmente ho tra le mani il netbook comprato a dicembre (mica male l&#8217;assitenza Acer, <a title="Cose da Pazzi!" href="http://www.tommyblue.it/2009/03/11/cose-da-pazzi/">lo ha tenuto solo 5 mesi</a>&#8230;) e ho deciso subito di togliere la sua distribuzione (una Fedora rimaneggiata col pregio di avviarsi veramente alla svelta) e provarci Ubuntu 9.04 &#8220;Jaunty Jackalope&#8221; in versione Remix. Nella pagina di download ci sono tutte le istruzioni per copiare l&#8217;immagine di Ubuntu nella penna USB e avviarla.</p>
<p>Out-of-the-box funziona praticamente tutto, ma per rendere la distribuzione &#8220;utilizzabile&#8221; bisogna un po&#8217; spippolare, quindi approfittando della richiesta dell&#8217;Alice metto per iscritto quello che ho fatto.</p>
<p><strong>E qui cominciano i magheggi :) <img class="alignnone size-full wp-image-386" title="Magheggi" src="http://www.tommyblue.it/wp-content/uploads/2009/05/wizzard_enjoyes_the_spell_by_madb0y.gif" alt="Magheggi" width="106" height="43" /></strong></p>
<p>Tanto per cominciare alla memoria SSD interna da 8GB (veramente leeeenta) <strong>ho affiancato una seconda SSD da 8GB <a title="Secure Digital High Capacity" href="http://it.wikipedia.org/wiki/Secure_Digital" target="_blank">SDHC</a></strong> che tengo sempre inserita nel lettore di sinistra del netbook. Durante l&#8217;installazione ho scelto questa memoria (<em><strong>/dev/mmcblk0p</strong></em><strong>X</strong>) per <strong>/home</strong>, <strong>/var </strong>e <strong>/usr</strong> (rispettivamente di 2, 2 e 4GB) e non ho usato swap (mandando a quel paese l&#8217;installer che invece ci terrebbe tanto). La partizione root invece l&#8217;ho dovuta montare sulla memoria interna (altrimenti non parte&#8230;.).</p>
<p>Tutte le partizioni sono state formattate con filesystem <strong>ext2</strong>.</p>
<p>Una volta terminata l&#8217;installazione e avviato il sistema ho fatto alcune modifiche al file <strong>/etc/fstab</strong> per diminuire le scritture del disco (<strong>noatime,nodiratime</strong>) e montare in ram alcune partizione temporanee:<br />
<code>UUID=fc754074-882f-4747-bb5c-830a2dac9bfd /               ext2    noatime,nodiratime,errors=remount-ro 0       1<br />
# /boot was on /dev/sda1 during installation<br />
UUID=d728086f-41f8-462a-86d7-515fb19f71cf /boot           ext2    noatime,nodiratime        0       0<br />
# /home was on /dev/mmcblk0p3 during installation<br />
UUID=3abedbbb-f626-48aa-8d69-fc37991e25e8 /home           ext2    noatime,nodiratime        0       0<br />
# /usr was on /dev/mmcblk0p1 during installation<br />
UUID=60d18845-4c7b-4567-afa3-b7285679609c /usr            ext2    noatime,nodiratime        0       0<br />
# /var was on /dev/mmcblk0p2 during installation<br />
UUID=2b90d8e1-27d0-4a3d-a4db-7b5bf3e37c6b /var            ext2    noatime,nodiratime        0       0<br />
tmp          /tmp             tmpfs    defaults                           0 0<br />
vartmp          /var/tmp             tmpfs    defaults                           0 0<br />
varlog          /var/log             tmpfs    defaults                           0 0</code></p>
<p>Attenzione alla partizione <strong>/var/log</strong>: montata su tmpfs fa molto arrabbiare i programmi che di default loggherebbero in una sua sottocartella e non la trovano all&#8217;avvio (ad esempio <em>apache</em>).</p>
<p>Ho aggiunto anche <strong>elevator=noop</strong> come opzione di avvio del kernel (quindi nel file <strong>/boot/grub/menu.lst</strong>).</p>
<p>Allo script di avvio <strong>/etc/rc.local</strong> ho aggiunto le voci:<br />
<code># As in the rc.last.ctrl of Linpus<br />
echo ondemand &gt; /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor<br />
echo ondemand &gt; /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor<br />
cat /sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate_max &gt; /sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate<br />
echo 1 &gt; /sys/devices/system/cpu/sched_smt_power_savings<br />
echo 10 &gt; /sys/module/snd_hda_intel/parameters/power_save<br />
#Decrease power usage of USB while idle<br />
[ -w /sys/bus/usb/devices/1-5/power/level ] &amp;&amp; echo auto &gt; /sys/bus/usb/devices/1-5/power/level<br />
[ -w /sys/bus/usb/devices/5-5/power/level ] &amp;&amp; echo auto &gt; /sys/bus/usb/devices/5-5/power/level<br />
</code></p>
<p>Ed infine a <strong>/etc/sysctl.conf</strong>:<br />
<code># Economize the SSD<br />
# Strongly discourage swapping (default 60)<br />
vm.swappiness = 1<br />
# Don't shrink the inode cache aggressively (default 100)<br />
vm.vfs_cache_pressure = 50<br />
# (default 499)<br />
vm.dirty_writeback_centisecs = 1500<br />
# (default 10)<br />
vm.dirty_ratio = 20<br />
# (default 5)<br />
vm.dirty_background_ratio = 10<br />
# (default 0)<br />
vm.laptop_mode = 5<br />
</code></p>
<p><strong>Work in progress</strong></p>
<ul>
<li>Per far funzionare i led della wireless bisogna scaricare, compilare ed installare i driver madwifi direttamente da svn ed aggiungere queste voci a <strong>/etc/sysctl.conf</strong>:<br />
<code>dev.wifi0.ledpin = 3<br />
dev.wifi0.softled = 1</code></li>
<li><strong>Non funziona la sospensione</strong> (ma almeno non corrompe la memoria esterna come Ubuntu 8.xx), ma dato che con <a href="http://www.linux4one.it">Linux4One</a> funziona cercherò di capire cosa hanno fatto e replicarlo</li>
</ul>
<p><strong>Webografia</strong></p>
<ul>
<li><a href="# https://help.ubuntu.com/community/AspireOne" target="_blank">https://help.ubuntu.com/community/AspireOne</a></li>
<li><a href="http://fedoraproject.org/wiki/Acer_Aspire_One" target="_blank">http://fedoraproject.org/wiki/Acer_Aspire_One</a></li>
<li><a href="http://linux4one.it/" target="_blank">http://linux4one.it/</a></li>
</ul>

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		<item>
		<title>Convertire il filesystem della partizione root</title>
		<link>http://www.tommyblue.it/2009/03/19/convertire-il-filesystem-della-partizione-root/</link>
		<comments>http://www.tommyblue.it/2009/03/19/convertire-il-filesystem-della-partizione-root/#comments</comments>
		<pubDate>Thu, 19 Mar 2009 10:05:06 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[Informatica]]></category>
		<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[fedora]]></category>
		<category><![CDATA[lvm]]></category>
		<category><![CDATA[xfs]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=359</guid>
		<description><![CDATA[Ovvero come installare Fedora 10 da cd utilizzando XFS come filesystem per la root (/) :) Nota: avrete bisogno di due partizioni di almeno 4/5 GB L&#8217;uso di XFS è molto utile specialmente se utilizzato in coppia con LVM (in particolare per espandere le partizioni &#8220;al volo&#8221;), cosa che spiegherò di seguito. I passi sono [...]]]></description>
			<content:encoded><![CDATA[<p><strong>Ovvero come installare Fedora 10 da cd utilizzando XFS come filesystem per la root (/) :)</strong></p>
<p><em>Nota: avrete bisogno di due partizioni di almeno 4/5 GB</em></p>
<p>L&#8217;uso di XFS è molto utile specialmente se utilizzato in coppia con LVM (in particolare per espandere le partizioni &#8220;al volo&#8221;), cosa che spiegherò di seguito.<br />
I passi sono molto semplici:</p>
<ol>
<li>Avviate dal cd di Fedora 10</li>
<li>Installate normalmente Fedora utilizzando una partizione LVM di almeno  5.0 GB il cui filesystem sarà scelto tra quelli disponibili nell&#8217;installer (ext2 o ext3). <strong>La partizione /boot non può stare su LVM, quindi dedicategli una piccola partizione primaria (200 Mb generalmente bastano).</strong></li>
<li>Una volta terminato create una nuova partizione LVM e formattatela in XFS:
<ul>
<li>aprite un terminale e digitate <strong><em>su</em></strong> diventando <em>root</em></li>
<li>installate il necessario per maneggiare i filesystem XFS: <em><strong>yum install xfsprogs</strong></em></li>
<li>Create un nuovo volume logico: <strong><em>lvcreate -L 5G -n fedora VolGroup00</em></strong></li>
<li>Formattate in XFS il fs appena creato: <strong><em>mkfs.xfs /dev/VolGroup00/fedora</em></strong></li>
</ul>
</li>
<li>Adesso montate le due partizioni e copiate i dati da una all&#8217;altra:
<ul>
<li><em><strong>mkdir /mnt/old_root &amp;&amp; mkdir /mnt/fedora</strong></em></li>
<li><em><strong>mount /dev/VolGroup00/old_root /mnt/old_root &amp;&amp; mount /dev/VolGroup00/fedora /mnt/fedora</strong></em></li>
<li><em><strong>cp -a /mnt/old_root/* /mnt/fedora</strong></em></li>
</ul>
</li>
<li>Terminata quest&#8217;operazione bisogna editare <em>grub</em> (il file <em><strong>/mnt/boot/grub/menu.lst</strong></em>, dovrete prima montare la partizione ad es. in <strong>/mnt/boot</strong>) modificando il filesystem root: la voce dovrebbe essere qualcosa tipo <strong>root=UUID=0f01a383-6557-4d17-be11-14bd50c6c4f7</strong>. Modificatela in <strong>root=/dev/VolGroup00/fedora</strong></li>
<li>Editate anche il file /mnt/fedora/etc/fstab editando la linea:<br />
<strong>/dev/lvm0/old_root / ext3 defaults 1 1</strong><br />
in<br />
<strong>/dev/lvm0/fedora / xfs defaults 1 1</strong></li>
<li>Per finire bisogna ricreare il file initrd quindi, supponendo che il kernel installato sia <em>2.6.27.5-117.fc10.i686.img </em>e che la nuova partizione XFS sia ancora montata in <strong><em>/mnt/fedora</em></strong>:
<ul>
<li><em><strong>mount -t proc none /mnt/fedora/proc</strong></em></li>
<li><em><strong>mount -o bind /dev /mnt/fedora/dev</strong></em></li>
<li><em><strong>chroot /mnt/fedora /bin/bash</strong></em></li>
<li><em><strong>mount /boot</strong></em></li>
<li><em><strong>mv /boot/initrd-2.6.27.5-117.fc10.i686.img /boot/initrd-2.6.27.5-117.fc10.i686.img.backup</strong></em></li>
<li><em><strong>mkinitrd /boot/initrd-2.6.27.5-117.fc10.i686.img 2.6.27.5-117.fc10.i686</strong></em></li>
</ul>
</li>
<li>Bene, se avete fatto tutti i passaggi correttamente (e io non mi sono scordato nulla) potete riavviare e avrete il filesystem di root in XFS!</li>
</ol>
<p>Adesso che avete LVM e XFS se lo spazio nella partizione si sta esaurendo lo potete aumentare al volo senza neanche riavviare. I passi sono questi:</p>
<ol>
<li>Ingrandite di 10GB la partizione: <strong><em>lvextend -L+10G /dev/VolGroup00/fedora</em></strong></li>
<li>Adattate il filesystem alla nuova dimensione: <em><strong>xfs_growfs /</strong></em></li>
<li>Finito! La partizione di root adesso ha 10GB liberi in più :D</li>
</ol>

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		<item>
		<title>Aggiungere una chiave GPG di un repository</title>
		<link>http://www.tommyblue.it/2009/02/25/aggiungere-una-chiave-gpg-di-un-repository/</link>
		<comments>http://www.tommyblue.it/2009/02/25/aggiungere-una-chiave-gpg-di-un-repository/#comments</comments>
		<pubDate>Wed, 25 Feb 2009 00:33:40 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[How-To]]></category>
		<category><![CDATA[Informatica]]></category>
		<category><![CDATA[Memoria usiliaria]]></category>
		<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[debian]]></category>
		<category><![CDATA[gpg]]></category>
		<category><![CDATA[repository]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=344</guid>
		<description><![CDATA[I comandi son solo due, ma me li dimentico sempre :D gpg --keyserver subkeys.pgp.net --recv CHIAVE gpg --export --armorCHIAVE &#124; sudo apt-key add - Et Volià&#8230; Condividi questo post:]]></description>
			<content:encoded><![CDATA[<p>I comandi son solo due, ma me li dimentico sempre :D</p>
<p><code>gpg --keyserver subkeys.pgp.net --recv CHIAVE<br />
gpg --export --armorCHIAVE | sudo apt-key add -</code></p>
<p>Et Volià&#8230;</p>

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		<title>Aggiornare un&#8217;applicazione RubyOnRails</title>
		<link>http://www.tommyblue.it/2009/02/11/aggiornare-unapplicazione-rubyonrails/</link>
		<comments>http://www.tommyblue.it/2009/02/11/aggiornare-unapplicazione-rubyonrails/#comments</comments>
		<pubDate>Wed, 11 Feb 2009 13:07:49 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[Memoria usiliaria]]></category>
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		<guid isPermaLink="false">http://www.tommyblue.it/?p=333</guid>
		<description><![CDATA[Aggiornare un&#8217;applicazione esistente all&#8217;ultima versione possibile di RoR è una cosa abbastanza semplice, anche se spesso bisogna poi fare i conti con qualche stringa ormai obsoleta rimasta in qualche file (ma, anche qui, niente di difficile da risolvere). Ricordiamoci di scongelare l&#8217;applicazione se lo fosse: rake rails:unfreeze Iniziamo guardando le possibili opzioni di aggiornamento disponibili [...]]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft size-full wp-image-334" title="bruce_on_rails" src="http://www.tommyblue.it/wp-content/uploads/2009/02/bruce_on_rails.jpg" alt="bruce_on_rails" width="250" height="185" />Aggiornare un&#8217;applicazione esistente all&#8217;ultima versione possibile di RoR è una cosa abbastanza semplice, anche se spesso bisogna poi fare i conti con qualche stringa ormai obsoleta rimasta in qualche file (ma, anche qui, niente di difficile da risolvere).</p>
<p>Ricordiamoci di <em>scongelare</em> l&#8217;applicazione se lo fosse:<br />
<code>rake rails:unfreeze</code><br />
Iniziamo guardando le possibili opzioni di aggiornamento disponibili andando nella propria applicazione e lanciando:<br />
<code>rake -T rails:update</code><br />
L&#8217;output dovrebbe più o meno essere questo:<br />
<code>rake rails:update              # Update both configs, scripts and public/javascripts from Rails<br />
rake rails:update:configs      # Update config/boot.rb from your current rails install<br />
rake rails:update:javascripts  # Update your javascripts from your current rails install<br />
rake rails:update:scripts      # Add new scripts to the application script/ directory</code><br />
A questo punto basta eseguire in sequenza questi comandi e il gioco è fatto!</p>

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		<title>Controllare Mac OSX da Linux</title>
		<link>http://www.tommyblue.it/2009/02/09/controllare-mac-osx-da-linux/</link>
		<comments>http://www.tommyblue.it/2009/02/09/controllare-mac-osx-da-linux/#comments</comments>
		<pubDate>Mon, 09 Feb 2009 18:33:02 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[How-To]]></category>
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		<category><![CDATA[linux]]></category>
		<category><![CDATA[mac]]></category>
		<category><![CDATA[vnc]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=329</guid>
		<description><![CDATA[Ultimamente ho avuto bisogno di controllare il MacMini da remoto e ho dovuto moccolare non poco per poterlo fare da Linux: non so che tipo di autenticazione usi  il Desktop Remoto di Mac OSX, ma i soliti client VNC non ne volevano sapere di funzionare (perchè poi alla fine si tratta di una connessione VNC). [...]]]></description>
			<content:encoded><![CDATA[<p><a href="http://www.tommyblue.it/wp-content/uploads/2009/02/mac-vnc.png" rel="lightbox[329]"><img class="size-medium wp-image-330 alignleft" title="mac-vnc" src="http://www.tommyblue.it/wp-content/uploads/2009/02/mac-vnc-300x187.png" alt="mac-vnc" width="300" height="187" /></a>Ultimamente ho avuto bisogno di controllare il MacMini da remoto e ho dovuto moccolare non poco per poterlo fare da Linux: non so che tipo di autenticazione usi  il Desktop Remoto di Mac OSX, ma i soliti client VNC non ne volevano sapere di funzionare (perchè poi alla fine si tratta di una connessione VNC).</p>
<p>Il trucco sta in una impostazione del Desktop Remoto di Leopard (ma credo anche Tiger): basta andare in <em>Preferenze di Sistema &gt; Condivisione &gt; Gestione remota &gt; Impostazioni computer</em> e spuntare l&#8217;opzione <strong><em>I visori VCN possono controllare lo schermo mediante password</em></strong> (che bisogna poi inserire).</p>
<p>Nel fare ciò ho scoperto anche che tra gli <strong>applet di Gnome</strong> adesso c&#8217;è un comodissimo <em><strong>Visualizzatore di desktop remoti</strong></em> che faceva proprio al caso mio. Rileva anche in automatico gli host &#8220;vicini&#8221; a cui potersi connettere, tra cui, ovviamente, il mio MacMini :)</p>

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		<title>MacBook synaptics configuration for Hal</title>
		<link>http://www.tommyblue.it/2009/02/05/macbook-synaptics-configuration-for-hal/</link>
		<comments>http://www.tommyblue.it/2009/02/05/macbook-synaptics-configuration-for-hal/#comments</comments>
		<pubDate>Thu, 05 Feb 2009 16:40:09 +0000</pubDate>
		<dc:creator>TommyBlue</dc:creator>
				<category><![CDATA[Informatica]]></category>
		<category><![CDATA[Software Libero]]></category>
		<category><![CDATA[hal]]></category>
		<category><![CDATA[synaptics]]></category>
		<category><![CDATA[touchpad]]></category>

		<guid isPermaLink="false">http://www.tommyblue.it/?p=323</guid>
		<description><![CDATA[Since Ubuntu 8.10 the device configuration was moved from Xorg to Hal. So i had to &#8220;translate&#8221; my old notes to let my touchpad work with hal. Just create a new .fdi file into /etc/hal/fdi/policy and paste the translated configuration below: &#60;?xml version=&#34;1.0&#34; encoding=&#34;UTF-8&#34;?&#62; &#60;deviceinfo version=&#34;0.2&#34;&#62; &#60;device&#62; &#60;match key=&#34;info.capabilities&#34; contains=&#34;input.touchpad&#34;&#62; &#60;merge key=&#34;input.x11_driver&#34; type=&#34;string&#34;&#62;synaptics&#60;/merge&#62; &#60;merge key=&#34;input.x11_options.SendCoreEvents&#34; [...]]]></description>
			<content:encoded><![CDATA[<p>Since <strong>Ubuntu 8.10</strong> the device configuration was moved from <strong>Xorg</strong> to <strong>Hal</strong>. So i had to &#8220;translate&#8221; my <a href="/2008/07/27/macbook-synaptics-configuration/">old notes</a> to let my touchpad work with hal.<br />
Just create a new <strong>.fdi</strong> file into <strong><em>/etc/hal/fdi/policy</em></strong> and paste the translated configuration below:</p>
<p><code><span style="color:#ff3030; font-weight:bold">&lt;?xml</span> version=<span style="color:#1861a7">&quot;1.0&quot;</span> encoding=<span style="color:#1861a7">&quot;UTF-8&quot;</span>?&gt;<br />
<span style="color:#ff3030; font-weight:bold">&lt;deviceinfo</span> version=<span style="color:#1861a7">&quot;0.2&quot;</span>&gt;<br />
  <span style="color:#ff3030; font-weight:bold">&lt;device&gt;</span><br />
  <span style="color:#ff3030; font-weight:bold">&lt;match</span> key=<span style="color:#1861a7">&quot;info.capabilities&quot;</span> contains=<span style="color:#1861a7">&quot;input.touchpad&quot;</span>&gt;<br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_driver&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;synaptics<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.SendCoreEvents&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;true<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.Device&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;/dev/psaux<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.Protocol&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;auto-dev<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.SHMConfig&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;true<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.LeftEdge&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">100</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.RightEdge&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">1120</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.TopEdge&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">50</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.BottomEdge&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">310</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.FingerLow&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">5</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.FingerHigh&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">20</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.MaxTapTime&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">100</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.MaxTapMove&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">150</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.MaxDoubleTapTime&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">180</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.VertScrollDelta&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">20</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.HorizScrollDelta&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">50</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.MinSpeed&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">0.49</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.MaxSpeed&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">0.78</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.AccelFactor&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">0.0010</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.LockedDrags&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;false<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.TapButton1&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">1</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.TapButton2&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">3</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.TapButton3&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;<span style="color:#32ba06">2</span><span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.VertTwoFingerScroll&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;true<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.HorizTwoFingerScroll&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;false<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.FastTaps&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;true<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.VertEdgeScroll&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;false<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
      <span style="color:#ff3030; font-weight:bold">&lt;merge</span> key=<span style="color:#1861a7">&quot;input.x11_options.HorizEdgeScroll&quot;</span> type=<span style="color:#1861a7">&quot;string&quot;</span>&gt;false<span style="color:#ff3030; font-weight:bold">&lt;/merge&gt;</span><br />
    <span style="color:#ff3030; font-weight:bold">&lt;/match&gt;</span><br />
  <span style="color:#ff3030; font-weight:bold">&lt;/device&gt;</span><br />
<span style="color:#ff3030; font-weight:bold">&lt;/deviceinfo&gt;</span></code></p>

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