Tomcat no Linux

sudo unzip apache-tomcat-7.0.37.zip -d /opt

   wget http://archive.apache.org/dist/tomcat/tomcat-7/v7.0.37/bin/apache-tomcat-7.0.37.zip

na basta bin: chmod 700 *.sh

sh startup.sh

Acessando pasta compartilhada windows pelo linux

# sudo apt-get install smbfs

# mount -t cifs -o guest //10.0.0.3/MP3 /mnt/mp3/

Linux Ubuntu - Low Graphics Mode

Only for ATI graphics cards

When the message that "your system is running in low-graphics mode" appears:
Press Ctrl+Alt+F1 to see the terminal one. Then login with your credentials, and then run the following commands:

sudo apt-get install fglrx    
sudo reboot

The same can be done from the recovery mode (after enabling networking), if your Ubuntu completly refuses to enter anything but recovery mode.

Instalando Glassfish no Ubuntu

Instale Java:

sudo apt-get install openjdk-7-jdk

Verifique se está funcionando:

javac -version

Instale o unzip:

sudo apt-get install unzip

Baixe e descompacte o Glassfish na pasta opt

wget http://download.java.net/glassfish/3.1.1/release/glassfish-3.1.1.zip
sudo unzip glassfish-3.1.1.zip -d /opt

Crie um arquivo de inicialização

sudo vim /etc/init.d/glassfish

#!/bin/bash

GLASSFISH_HOME=/opt/glassfish3
case "$1" in
start)
    ${GLASSFISH_HOME}/bin/asadmin start-domain domain1
    ;;
stop)
    ${GLASSFISH_HOME}/bin/asadmin stop-domain domain1
    ;;
restart)
    ${GLASSFISH_HOME}/bin/asadmin stop-domain domain1
    ${GLASSFISH_HOME}/bin/asadmin start-domain domain1
    ;;
*)
    echo "usage: $0 {start|stop|restart}"
    ;;

esac

exit 0

Obs: Para salvar e fechar o vim aperte "Esc" depois ":w" para salvar e então "Esc" ":q" para fechá-lo.

Após isto, dar permissão e então iniciar

sudo chmod 755 /etc/init.d/glassfish
sudo update-rc.d /etc/init.d/glassfish defaults

sudo /etc/init.d/glassfish start

créditos: http://blog.rueedlinger.ch/2012/02/glassfish-3-1-and-mysql-5-1-on-ubuntu-server-11-10/

Linux Ubuntu - Inserir senha inicial para o root

Comando:
 - sudo passwd root

Filtro Selects em JS

<html>

<head>

<script type="text/javascript">

function mudar(obj) {
sumirTudo();
if(obj.value != '') aparecer('sel_' + obj.value);
}

function sumirTudo() {
document.getElementById('sel_1').style.display = 'none';
document.getElementById('sel_2').style.display = 'none';
document.getElementById('sel_3').style.display = 'none';
}

function aparecer(id) {
document.getElementById(id).style.display = 'block';
}

</script>

</head>

<body onload="sumirTudo();">

<select onchange="mudar(this)">
<option value=""></option>
<option value="1">a</option>
<option value="2">b</option>
<option value="3">c</option>
</select>

<select id="sel_1">
<option value="1">a1</option>
<option value="2">b1</option>
<option value="3">c1</option>
</select>

<select id="sel_2">
<option value="1">a2</option>
<option value="2">b2</option>
<option value="3">c2</option>
</select>

<select id="sel_3">
<option value="1">a3</option>
<option value="2">b3</option>
<option value="3">c3</option>
</select>

</body>

</html>