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		<title>Ubuntu e seus updates.</title>
		<link>http://www.valdineidossantos.com/2008/07/ubuntu-e-seus-updates/</link>
		<comments>http://www.valdineidossantos.com/2008/07/ubuntu-e-seus-updates/#comments</comments>
		<pubDate>Sun, 06 Jul 2008 01:42:29 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[dia a dia]]></category>
		<category><![CDATA[Sistemas Operacionais]]></category>
		<category><![CDATA[aptitude]]></category>
		<category><![CDATA[atualizaçao]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[ubuntu]]></category>
		<category><![CDATA[update]]></category>
		<category><![CDATA[wifi]]></category>
		<category><![CDATA[wireless]]></category>

		<guid isPermaLink="false">http://valdineidossantos.com/?p=15</guid>
		<description><![CDATA[Hoje fiz uma atualização de segurança do Ubuntu, não que eu sempre veja mas dessa vez eu nem passei o olho para saber o que se passava. Isso é um grande erro. Essas atualização incluiam o pacote linux-restricted-modules-2.6.24-19-generic, feito todas as instalações pediu para reinciar o computador. Poxa mas isso é linux ou Windows? Me [...]]]></description>
			<content:encoded><![CDATA[<p>Hoje fiz uma atualização de segurança do Ubuntu, não que eu sempre veja mas dessa vez eu nem passei o olho para saber o que se passava. Isso é um grande erro.<br />
Essas atualização incluiam o pacote linux-restricted-modules-2.6.24-19-generic, feito todas as instalações pediu para reinciar o computador. Poxa mas isso é linux ou Windows? Me perguntei. Logo veio a resposta realmente estão reproduzindo o windows no Ubuntu. Resultado parcial, parou de funcionar minha rede sem fio e minha placa de som nem olhei o resto.<br />
Vamos aos passos para sabermos o porque do não funcionamento.</p>
<p>Digite o comando<br />
dmesg.</p>
<p>Com este comando eu visualizo as mensagens de carregamento do sistema, com muita paciência fui vendo linha a linha até encontrar algo que me parecece (é assim que se escreve?) estranho.<br />
Achei a linha WL com uma mensagem de Fatal erro. Vamos ao passo dois que é copiar essa string (linha de palavras) e entrar no tio google para saber se alguém já teve esse problema.<br />
Achei milhares de coisas relacionadas e algumas que não tinham nada haver.<br />
Minha máquina é um notebook Inspiron 1525 da fabricante Dell, sendo assim sempre procurava entrar nas palavras relacionadas. Minhas palavras chaves eram Ubuntu, Inspiron, Dell, E o erro encontrado como saida do dmesg.<br />
Achei um forum muito interessante em que alguém tinha o mesmo computador que o meu e o problema exatamente igual. Descobri que a Dell também tem um site com informações de ajuda e da comunidade.<br />
Resumindo a historia pois já escrevi muito. Para que minha placa de som e Wireles voltasse a funcionar tenho que voltar a versão do linux-restrict. Fui no menu sistema-&gt;administração-&gt;Gerenciador de Pacotes Synaptic, e verifiquei as versões que existiam. Para meu espanto existia três versões do mesmo pacote só não sei para que.<br />
Vamos resolver o problema, desinstalei todos os pacotes que não queria e deixei apenas o que realmente me interessava. Reinicie e no menu do Grub fui até a versão do linux-restrict 18 no modo recovery e pronto. Instalei a versão que estava funcional.<br />
Para ter certeza que a versão errada não seja chamada novamente desinstalei a versão mais nova também. Agora com o sistema limpo e funcional fui no google de novo para saber a última informação.<br />
E se este pacote defeituoso voltar a ser instalar no meu sistema? Existe uma flag que podemos adicionar ao comando aptitute para que esse pacote não seja atualizado sozinho. Não sei se funciona mas fiz o seguinte.</p>
<p>sudo aptitude hold linux-restricted-modules-2.6.24-18-generic<br />
sudo aptitude hold linux-restricted-modules-common</p>
<p>Após essa longa jornada, só como detalhe perdi 3 horas fazendo todas essas tentativas, mandei o synaptic verificar por atualizações e ele respondeu que o sistema se encontrava com a versão mais recente. Então conclui que tudo estava direito e funcionando e o pacote com erro não entraria no meu sistema por discuido de não olhar o que vai ser instalado.</p>
<p>Ubuntu não vire windows, senão vou abandona-lo e vou voltar para FreeBSD.</p>


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		<title>Wifi em linha de comando</title>
		<link>http://www.valdineidossantos.com/2008/06/wifi-em-linha-de-comando/</link>
		<comments>http://www.valdineidossantos.com/2008/06/wifi-em-linha-de-comando/#comments</comments>
		<pubDate>Mon, 09 Jun 2008 14:50:46 +0000</pubDate>
		<dc:creator>Valdinei</dc:creator>
				<category><![CDATA[dia a dia]]></category>
		<category><![CDATA[Sistemas Operacionais]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[rede]]></category>
		<category><![CDATA[ubuntu]]></category>
		<category><![CDATA[unix]]></category>
		<category><![CDATA[wifi]]></category>

		<guid isPermaLink="false">http://www.4genius.com.br/valdinei/?p=9</guid>
		<description><![CDATA[O ubuntu tem inúmeros programas para fazer a conexão wifi em notebooks. Mas eu queria saber como fazer na mão em linha de comando. Após  procurar um pouco na Internet, ou seja no google consegui algumas informações que vou passar aqui no blog. Em primeiro lugar vamos encontrar as redes disponiveis para conexão. Inclusive as [...]]]></description>
			<content:encoded><![CDATA[<p>O ubuntu tem inúmeros programas para fazer a conexão wifi em notebooks. Mas eu queria saber como fazer na mão em linha de comando.</p>
<p>Ap<span>ós  procurar um pouco na Internet, ou seja no google consegui algumas informaç<span>ões que vou passar aqui no blog.</span></span><br />
Em primeiro lugar vamos encontrar as redes disponiveis para conexão. Inclusive as dos vizinhos então usem com moderação esta dica.</p>
<p>Digite :</p>
<pre class='brush: shell'>
iwlist scan
</pre>
<p>Neste momento será retornado as redes disponiveis.<br />
Exemplo de saida do programa iwlist:</p>
<pre class='brush: shell'>
lo        Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

eth1      Scan completed :
Cell 01 - Address: 00:30:65:05:E6:04
ESSID:"minha_rede"
Protocol:IEEE 802.11b
Mode:Master
Channel:1
Frequency:2.412 GHz (Channel 1)
Encryption key:on
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
Quality=64/100  Signal level=-62 dBm
Extra: Last beacon: 4156ms ago
</pre>
<p>Explicando a interface lo é a da própria máquina, a interface eth0 é da rede cabeada e não poderá ser feito o scan de redes sem fio por ela. A que realmente importa é a eth1 pois é minha rede sem fios.<br />
Foi encontrada a rede de nome minha_rede e existem uma senha habilitada para a mesma.<br />
Agora que a rede foi detectada vamos ao passo dois que é associar ela a sua interface, neste momento você vai precisar da senha de administrador do computador.</p>
<p>Digite:</p>
<pre class='brush: shell'>
sudo iwconfig eth1 essid "minha_rede" key s:sua_senha_da_rede
</pre>
<p>Neste momento você esta fazendo a associação da rede &#8220;minha_rede&#8221; a sua interface de rede eth1 utilizando uma senha baseada em ASCII sua_senha_da_rede que contem 12 caracteres.</p>
<p>Algumas observações até esse ponto. No meu caso minha interface de rede ligada é a eth1, mas podem ser outros dependendo do fabricante. Poderiam ser também wlan0, ath0 dentre outras.<br />
Segundo ponto é que minha rede utiliza senha para acesso, essa senha é baseada em ASCII mas não é um padrão podem haver outros.</p>
<p>Agora para finalizar caso sua máquina trabalhe com DHCP (ip dinâmico) você terá de conseguir seu ip novo com um comando.</p>
<p>Digite:</p>
<pre class='brush: shell'>
sudo dhclient eth1
</pre>
<p>Neste momento você receberá um ip e já pode se conectar a rede local e caso essa rede tenha acesso a internet pode navegar.</p>
<p>Para maiores informações e eu aconselho que seja feito a leitura do manual <img src='http://www.valdineidossantos.com/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
<p>Digite:</p>
<pre class='brush: shell'>
man iwconfig
</pre>
<p>Obrigado <a title="Joe Rabelo" href="http://www.4genius.com.br/joe" target="_blank">Joe Rabelo</a> pelos testes na sua máquina.</p>


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