These are the steps to install OpenOffice 3.1 on Ubuntu.
First of all download OpenOffice 3.1 from the official web site. When you’re done, follow these steps:
1. Remove previous version
sudo apt-get remove openoffice*.*
2. Remove settings folder
This will remove ALL your OpenOffice settings
3. Expand the archive
tar -xvzf OOo_3.1.0_LinuxIntel_install_en-US_deb.tar.gz
4. Setup
cd OOO310_m11_native_packed-4_en-US.9399/DEBS/
sudo dpkg -i *.deb
5. Setup desktop integration
cd desktop-integration
sudo dpkg -i openoffice.org3.1-debian-menus_3.1-9393_all.deb
Tags: Linux, OpenOffice, Ubuntu -
A java implementation of the Unix tail command. This is a small customization of the java tail class created by Luigi Viggiano. I’ve just added some controls and added the update time parameter.
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
/**
* Java implementation of the Unix tail command
*
* @param args[0] File name
* @param args[1] Update time (seconds). Optional. Default value is 1 second
*
* @author Luigi Viggiano (original author) http://it.newinstance.it/2005/11/19/listening-changes-on-a-text-file-unix-tail-implementation-with-java/
* @author Alessandro Melandri (modified by)
* */
public class Tail {
static long sleepTime = 1000;
public static void main(String[] args) throws IOException {
if (args.length > 0){
if (args.length > 1)
sleepTime = Long.parseLong(args[1]) * 1000;
BufferedReader input = new BufferedReader(new FileReader(args[0]));
String currentLine = null;
while (true) {
if ((currentLine = input.readLine()) != null) {
System.out.println(currentLine);
continue;
}
try {
Thread.sleep(sleepTime);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
break;
}
}
input.close();
} else {
System.out.println("Missing parameter!\nUsage: java JavaTail fileName [updateTime (Seconds. default to 1 second)]");
}
}
}
Tags: Java -
If you install VMware on linux you may find that some keys (up/down keys, home key, etc…) don’t work in the guest operating system.
You need to create a config file inside the .vmware folder in your home directory and paste this text info the file:
xkeymap.keycode.108 = 0x138 # Alt_R
xkeymap.keycode.106 = 0x135 # KP_Divide
xkeymap.keycode.104 = 0x11c # KP_Enter
xkeymap.keycode.111 = 0x148 # Up
xkeymap.keycode.116 = 0x150 # Down
xkeymap.keycode.113 = 0x14b # Left
xkeymap.keycode.114 = 0x14d # Right
xkeymap.keycode.105 = 0x11d # Control_R
xkeymap.keycode.118 = 0x152 # Insert
xkeymap.keycode.119 = 0x153 # Delete
xkeymap.keycode.110 = 0x147 # Home
xkeymap.keycode.115 = 0x14f # End
xkeymap.keycode.112 = 0x149 # Prior
xkeymap.keycode.117 = 0x151 # Next
xkeymap.keycode.78 = 0x46 # Scroll_Lock
xkeymap.keycode.127 = 0x100 # Pause
xkeymap.keycode.133 = 0x15b # Meta_L
xkeymap.keycode.134 = 0x15c # Meta_R
xkeymap.keycode.135 = 0x15d # Menu
Tags: Linux, Ubuntu, VMware -
The textarea field doesn’t have a maxlength attribute like text fields, so you need Javascript to get the same functionality:
function getMaxLength(textarea,maxlength){
if (textarea.value.length > maxlength)
textarea.value = textarea.value.substring(0,maxlength);
updateCounter(textarea.value.length,maxlength);
}
function updateCounter(currentCount,maxlength){
document.getElementById('counter').innerHTML = currentCount + "/" + maxlength;
}Now modify the textarea like this and you are done:
<form>
<textarea onkeyup="return getMaxLength(this,500)" cols="60" rows="10"></textarea>
<div id="counter">0/500</div>
</form>
Tags: HTML, Javascript -
These are the steps to install an Apache-MySQL-PHP server on an Ubuntu desktop machine.
# Install Apache 2
sudo apt-get install apache2
#Install PHP5
sudo apt-get install php5
#Install MySQL
sudo apt-get install mysql-server
#Install MySQL for Apache
sudo apt-get install libapache2-mod-auth-mysql
#Install PHP MySQL Support
sudo apt-get install libapache2-mod-php5
sudo apt-get install php5-mysql
#Restart Apache
sudo /etc/init.d/apache2 restart
Managing Apache
Web files must be placed in ”/var/www/”.
sudo /etc/init.d/apache2 start
sudo /etc/init.d/apache2 stop
sudo /etc/init.d/apache2 restart
Managing MySql
sudo /etc/init.d/mysqld start
sudo /etc/init.d/mysqld stop
sudo /etc/init.d/mysqld restart
Tags: Apache, LAMP, Linux, MySQL, PHP, Ubuntu -
I’ve tested this procedure on Fedora 10 and Ubuntu 9.04 but It should work on other distributions too.
First of all download the latest JDK package from the SUN page: be sure to download the bin file and not the rpm.
From now on you’ll need to run commands using ‘’sudo”.
Move the package to /opt/ and make it executable.
cd /path/to/download/folder
mv jdk-versionnumber-linux-i586.bin /opt/
cd /opt/
chmod +x jdk-versionnumber-linux-i586.bin
Now start the installation and follow the onscreen instructions
./jdk-versionnumber-linux-i586.bin
When the installation is done you’ll need to set the JAVA_HOME enviroment variable and add java executable to the system pah.
Open the file /etc/profile and add the following lines
JAVA_HOME="/opt/jdk_versionnumber"
export JAVA_HOME
PATH=$PATH:/opt/jdk_versionnumber/bin/
export PATH
Now add a symbolic link for the java command
ln -s /opt/jdk_versionnumber/bin/java /usr/bin/java
Log off and log in back and you’re done.
Tags: Java, JDK, Linux -
This is a simple example on how to get the WEB-INF directory path in a J2EE web application.
public class MyClassName{
private static final String WEBINF = "WEB-INF";
public String getWebInfPath(){
String filePath = "";
URL url = MyClassName.class.getResource("MyClassName.class");
String className = url.getFile();
filePath = className.substring(0,className.indexOf(WEBINF) + WEBINF.length());
return filePath;
}
}
Tags: J2EE, Java -
This is a simple class that I usually use to connect to a MySQL database. Obviously the right MySQL JDBC driver must be in your classpath.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ConnectionManager {
// Connection data -- START
static final String driver = "com.mysql.jdbc.my_driver_version";
static final String dbserver = "mysql.server.name";
static final String dbport = "mysql.database.port";
static final String dbname = "mysql.database.name";
static final String dbuser = "mysql.database.username";
static final String dbpass = "mysql.database.password";
// Connection data -- END
/**
* Opens a connection to the database
*
* @return Returns a Connection object
*/
public static Connection getConnection(){
Connection con = null;
try {
Class.forName(driver).newInstance();
String conString = "jdbc:mysql://"+dbserver+":"+dbport+"/"+dbname;
con = DriverManager.getConnection(conString,dbuser, dbpass);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return con;
}
public static void close(Object object){
if (object != null){
try {
if (object instanceof Connection)
((Connection)object).close();
else if (object instanceof Statement)
((Statement)object).close();
else if (object instanceof PreparedStatement)
((PreparedStatement)object).close();
else if (object instanceof ResultSet)
((ResultSet)object).close();
} catch (SQLException e) {
e.printStackTrace();
} finally {
object = null;
}
}
}
}
Tags: Java, JDBC, MySQL -
