The warnings are probably like this

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used.GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991
 
W: Failed to fetch http://dl.google.com/linux/deb/dists/stable/Release  
 
W: Some index files failed to download, they have been ignored, or old ones used instead.
W: You may want to run apt-get update to correct these problems

That’s the warnings I got when I added google debian repository. There won’t be anything bad about it, since we could still install the packages from that repositories. But, I we could get rid the warnings, that’s would be a lot better. We could use gpg command to get the key.

Short Version

For you who don’t want to read pointless explanations below, here’s the short version

gpg --keyserver hkp://subkeys.pgp.net --recv-keys A040830F7FAC5991
gpg --export --armor 7FAC5991 | sudo apt-key add -

Long Version

Here’s the explained step. First we have to get the key from the key server.

gpg --keyserver hkp://subkeys.pgp.net --recv-keys A040830F7FAC5991

The A040830F7FAC5991 is from the warning shown before. You might want to change it if you have different repository. For the google repository, you should get this as the output

gpg: requesting key 7FAC5991 from hkp server subkeys.pgp.net
gpg: key 7FAC5991: public key "Google, Inc. Linux Package Signing Key <linux-packages-keymaster@google.com>" imported
gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
gpg: Total number processed: 1
gpg:               imported: 1

After that, type

gpg --export --armor 7FAC5991 | sudo apt-key add -

Where the 7FAC5991 is from the output shown before.

After that you’ll get OK as the output. You may run apt-get update again.

Oh, one more thing, I only tested this method in opera and google repositories

Luckily, I know python. Stupid me. Why didn’t I think it at first time. It was couple minutes of python and all the spaces were replaced by underscores. Thanks to python. All I did were

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$ python
Python 2.5.2 (r252:60911, Oct  5 2008, 19:24:49) 
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> files = os.listdir('./')
>>> for f in files:
...     os.rename(f, f.replace(' ', '_'))
... 
>>>

Or if you want to save in a script, you could you this

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#!/usr/bin/python
 
import os
import sys
 
files = os.listdir(sys.argv[1])
for f in files:
    os.rename(f, f.replace(' ', '_'))

The script takes the directory path as the argument. You could modify the script to use regex to have a better rename rule

Open software sources (System > Administration > Software Sources). In Third-Party Software tab, click Add and paste the code below

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deb http://ppa.launchpad.net/banshee-team/ubuntu hardy main

If you need the source, you could repeat the Add proccess, and paste this

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deb-src http://ppa.launchpad.net/banshee-team/ubuntu hardy main

Close the Software Sources. Wait for a few moment while the software update your package database. Then open the terminal, and type

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sudo apt-get install banshee-1

Yes, use banshee-1. If you use banshee, you’ll get the old Banshee 0.13.2 from universe repository.

And, enjoy your new Banshee

So I decided to create my own CodeIgniter and JQuery tutorial based on pr0digy’s tutorial. I’m assuming you already know how to code using CodeIgniter. If you’re new to CodeIgniter, you need to find others tutorial first. The videos given in CodeIgniter’s site is a good start.

This tutorial is about creating simple CodeIgniter + database + ajax system. User will be shown a form to post a message. Then after he/she press the submit button, the system will save the message using ajax and then show the message. You could see the result first if you want.

Database

The first thing we need to do is creating a table to save the message. For this tutorial, We will use this:

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CREATE TABLE IF NOT EXISTS `messages` (
  `id` tinyint(4) NOT NULL AUTO_INCREMENT,
  `message` varchar(256) NOT NULL,
  PRIMARY KEY  (`id`)
)

Controller

Then, we need to create a controller. My controller is named message. You could name your controller any name you like. After that, create 2 functions/methods, view and add.

view is used to get the default view and list of messages from the database. The codes are:

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function view($type = NULL)
{
    // get data from database
    $data['messages'] = $this->Message_model->get();
 
    if ($type == "ajax") // load inline view for call from ajax
        $this->load->view('messages_list', $data);
    else // load the default view
        $this->load->view('default', $data);
}

We fetch messages from the database using Message_model->get() function. Then the data is passed to the view. Here, we have 2 views called. One for the default view, where we called the page using message/view, and the other is for calling from ajax.

add is a proccess used to insert the message to the database. The codes are:

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function add()
{
    // if HTTP POST is sent, add the data to database
    if($_POST && $_POST['message'] != NULL) {
        $message['message'] = $_POST['message'];
        $this->Message_model->add($message);
    } else
        redirect('message/view');
}

This function is accessed when we press the submit button from the form. This function will save the message using Message_model->add() function.

Model

The next thing we need to create is the model. I use Message_model for the name. Here we create two functions, add and get. add is a function to insert the data into the database. get is a function to retrieve data from database. I think the codes are pretty self-explainatory, but you could drop me a message if you need some explainations on the codes.

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function add($data)
{
    $this->db->insert('messages', $data);
}

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function get($limit=5, $offset=0)
{
    $this->db->orderby('id', 'DESC');
    $this->db->limit($limit, $offset);
 
    return $this->db->get('messages')->result();
}

View

I use 2 files for view section. default.php and message_list.php. The message_list is used for displaying the messages taken from the database.

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<div id="form">
    <input type="text" id="message" name="message" />
    <input type="submit" id="submit" name="submit" value="submit" />
</div>
<div id="content">
<?php $this->load->view('messages_list') ?>
 
</div>

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<ol>
<?php foreach ($messages as $message): ?>
    <li><?= $message->message ?></li>
<?php endforeach ?>
</ol>

Hey, Where’s the JQuery?

Here we go. The last, and maybe the most important part of this tutorial. So, we the our controller, we had the model, and we had the views. I assume you already know how to include a jquery script to your view. The jquery codes are this:

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$(document).ready(function() {
    $('#submit').click(function() {
 
        var msg = $('#message').val();
 
        $.post("<?= site_url('message/add') ?>", {message: msg}, function() {
            $('#content').load("<?= site_url('message/view/ajax') ?>");
            $('#message').val('');
        });
    });
});

So, when we click the submit button, the javascript will take the value of input textbox then send it to message/add using post method. When the action succeed, the script will call message/view/ajax. Note the ajax keyword. It will call the message_list view instead of the default one. Then the view will replace the content in div#content tag.

Well done. You could see the demo I made from the tutorial.

You could download the whole files used in this tutorial in tutorial.zip (1.98 KB).

Or, if you prefer to get one by one,
controller: message (904 bytes)
model: message model (583 bytes)
view: default (782 bytes)
view: message_list (111 bytes)

I hope this tutorial helps newbie like me. If you have any question, just drop a comment below

Gathering information about your system...

 Distribution:          Ubuntu 8.04
 Desktop environment:   GNOME
 Graphics chip:         nVidia Corporation G70 [GeForce 7300 GT] (rev a1)
 Driver in use:         nvidia
 Rendering method:      Nvidia

Checking if it's possible to run Compiz on your system...

 Checking for texture_from_pixmap...               [ OK ]
 Checking for non power of two support...          [ OK ]
 Checking for composite extension...               [ OK ]
 Checking for FBConfig...                          [ OK ]

Checking for hardware/setup problems...            [ OK ]

If you got [ OK ] in every check, like mine, then your system is ready to run compiz. If something fails, go check the forum

It’s started with the large number of blogs created and written by Indonesian few years back. Thanks to blogger like Boy Avianto, Priyadi, Enda Nasution, and some others, people started to create blog to share their stories and knowledges.

Then, following the increasing number of Indonesian bloggers, Indonesian web 2.0 services started to show up. Some are Lintas Berita — a digg-like news site, Sharing Foto — a photo sharing website (too bad it’s closed), kronologger — a microblogging service. A believe there are plenty others I haven’t heard.

And now, we Indonesian have our own free blogging services. Blog Detik and and daddigdug two biggest free blogging services available. Blog Detik has the largest (citation needed) Indonesian news site behind it, detik.com, while daddigdug has some great Indonesian blogger working on it.

I believe there is still more to come. Internet offers limitless posibilities. Everyday, I always exited to find out what’s new from Indonesia. I eagerly read every blog I know, and hoping for something new. And talking about new innovation, I have names that I believe will bring new innovations to web 2.0 in Indonesia, some are Akhmad Fathonih and Kukuh TW.

And now I will try explain how to install oracle xe into the 64 bit system, ubuntu way. Of course we couldn’t follow the guide from oracle, since apt-get will detect our system architecture and we won’t get the 32 bit packages list.

Before we start, make sure you have the 32 bit library installed. It’s in reposity, all you have to do is

sudo apt-get install libc6-i386

The next thing to do is download the files needed. It’s libaio_0.3.104-1_i386.deb and oracle-xe-universal_10.2.0.1-1.1_i386.deb. You could use wget for this

wget -c http://oss.oracle.com/debian/dists/unstable/main/binary-i386/libaio_0.3.104-1_i386.deb http://oss.oracle.com/debian/dists/unstable/non-free/binary-i386/oracle-xe-universal_10.2.0.1-1.1_i386.deb.

After your downloads are finished, we continue to the main issue, forcing the package to be installed. You could try to install with usual dpkg -i first to make sure your system is really 64 bit.

sudo dpkg -i libaio_0.3.104-1_i386.deb

You’ll get error,

dpkg: error processing libaio_0.3.104-1_i386.deb (--install):
package architecture (i386) does not match system (amd64)
Errors were encountered while processing:
libaio_0.3.104-1_i386.deb

Added guide from Venka A