Code as Fast as You Can Think

Static Site Renderer (work in progress)

noreply@blogger.com (Anonymous) — Mon, 20 Feb 2017 03:42:00 +0000

WIP (Qt)

1 manually trigger the QWebEnginePage::SavePage action========
    QMenu *menu;
    if (page()->contextMenuData().linkUrl().isValid()) {
        menu = new QMenu(this);
        menu->addAction(page()->action(QWebEnginePage::OpenLinkInThisWindow));
        menu->addAction(page()->action(QWebEnginePage::OpenLinkInNewWindow));
        menu->addAction(page()->action(QWebEnginePage::OpenLinkInNewTab));
        menu->addAction(page()->action(QWebEnginePage::OpenLinkInNewBackgroundTab));
        menu->addSeparator();
        menu->addAction(page()->action(QWebEnginePage::DownloadLinkToDisk));
        menu->addAction(page()->action(QWebEnginePage::CopyLinkToClipboard));
    } else {
        menu = page()->createStandardContextMenu();
    }
    if (page()->contextMenuData().selectedText().isEmpty())
        menu->addAction(page()->action(QWebEnginePage::SavePage));
    connect(menu, &QMenu::aboutToHide, menu, &QObject::deleteLater);
    menu->popup(event->globalPos());

2. ========

void TabWidget::downloadRequested(QWebEngineDownloadItem *download)
{
    if (download->savePageFormat() != QWebEngineDownloadItem::UnknownSaveFormat) {
        SavePageDialog dlg(this, download->savePageFormat(), download->path());
        if (dlg.exec() != SavePageDialog::Accepted)
            return;
        download->setSavePageFormat(dlg.pageFormat());
        download->setPath(dlg.filePath());
    }

    BrowserApplication::downloadManager()->download(download);
    download->accept();
}
=====

http://stackoverflow.com/questions/38812787/how-to-handle-downloads-in-qwebengine
======

http://doc.qt.io/qt-5/qwebengineprofile.html#downloadRequested
======
http://doc.qt.io/qt-5/qwebenginepage.html#save

Wagtail CMS (new site setup FreeBSD 11)

noreply@blogger.com (Anonymous) — Sat, 04 Feb 2017 02:30:00 +0000

sudo pkg install bash

bash requires fdescfs(5) mounted on /dev/fd

If you have not done it yet, please do the following:

        mount -t fdescfs fdesc /dev/fd

To make it permanent, you need the following lines in /etc/fstab:

        fdesc   /dev/fd         fdescfs         rw      0       0
===
sudo pkg install emacs-nox11

To run tcsd automatically, add the following line to /etc/rc.conf:

tcsd_enable="YES"

You might want to edit /usr/local/etc/tcsd.conf to reflect your setup.

If you want to use tcsd with software TPM emulator, use the following
configuration in /etc/rc.conf:

tcsd_enable="YES"
tcsd_mode="emulator"
tpmd_enable="YES"

To use TPM, add your_account to '_tss' group like following:

# pw groupmod _tss -m your_account
===

portsnap fetch extract

===

cd /usr/ports/lang/python3
make install clean BATCH=YES

===
cd /usr/ports/databases/postgresql96-server/
make install clean BATCH=YES

sudo /usr/local/etc/rc.d/postgresql initdb
The files belonging to this database system will be owned by user "postgres".
You can now start the database server using:

    /usr/local/bin/pg_ctl -D /var/db/postgres/data96 -l logfile start

su postgres
$ createuser freebsd
$ createdb gchen

sudo -u postgres psql postgres

(username postgres, databasename postgres)

alter user freebsd password 'mypassword'

===
cd /usr/ports/databases/postgresql-libpqxx
make install clean BATCH=YES

===
cd /usr/ports/www/nginx-devel/ && make install clean
===
cd /usr/ports/sysutils/py-supervisor/ && make install clean
===
cd /usr/ports/devel/py-virtualenv/ && make install clean
===
cd /usr/ports/devel/py-pip/ && make install clean
==
/usr/ports/ports-mgmt/portupgrade-devel
==

cd /usr/ports/devel/git

===

cd /usr/ports/graphics/jpeg

===

 sudo tzsetup

===

bash

virtualenv -p /usr/local/bin/python3 py3wt

pip install -r mypip.txt (mypip.txt is the requirement file)

python manage.py migrate

python manage.py runserver

python manage.py collectstatic

===

 /usr/local/etc/supervisord.conf

===

cd /usr/ports/security/py-fail2ban/ && make install clean

Please do not edit the fail2ban.conf and jail.conf files as they
will be overwritten upon each upgrade of the port.

Instead, create new files named fail2ban.local and jail.local

For more information, see the official manual:

http://www.fail2ban.org/wiki/index.php/MANUAL_0_8#Configuration

If you are upgrading from 0.8.x consider adopting the new
configuration style.

===

sudo ee /etc/ssh/sshd_config

ChallengeResponseAuthentication no
sudo service sshd restart

===

/usr/ports/lang/python36

/usr/ports/databases/py36-sqlite3

binary: /usr/local/bin/python3.6

===

cd /usr/ports/sysutils/tmux/ && make install clean

===

/usr/ports/devel/qt5-core

/usr/ports/devel/qmake5

/usr/local/lib/qt5/bin/qmake

/usr/local/lib/qt5/bin/qmake -project

QT += core
QT -= gui

add cpp file, e.g. "main.cpp"

/usr/local/lib/qt5/bin/qmake -makefile

make

===

/usr/ports/www/w3m-img

  **********************************************************
* To display images in proper positions,                 *
* you should set font size of your terminal emulator to  *
* "# of pixels per character" and "# of pixels per line" *
* in Option Setting Panel.                               *
*                                                        *
* For example, if you use 14 pixel fonts, the values     *
* should be these.                                       *
*                                                        *
* # of pixels per character = 7                          *
* # of pixels per line = 14                              *
**********************************************************

===

 usr/ports/devel/boost-python-libs

Don't forget to add -pthread to your linker options when
linking your code.

You have built the Boost.Python library. You have to add the following
options when building your own code:

Compiler options:
   -I/usr/local/include/python2.7 -I/usr/local/include

Linker options:
   -L/usr/local/lib/python2.7 -L/usr/local/lib -lboost_python -lpython2.7

===

 cd /usr/ports/net/rabbitmq

===

/usr/ports/devel/catch

===

/usr/ports/databases/postgresql96-contrib

===

/usr/ports/devel/boost-python-libs

Compiler options:
   -I/usr/local/include/python2.7 -I/usr/local/include

Linker options:
   -L/usr/local/lib/python2.7 -L/usr/local/lib -lboost_python -lpython2.7

===

 /usr/ports/www/youtube_dl

If you want to use mp3 audio conversion please make sure multimedia/ffmpeg is
built with the "LAME" option enabled.
 ===

/usr/ports/security/py-certbot

Wagtail CMS (new site setup UBUNTU 16.04)

noreply@blogger.com (Anonymous) — Sun, 29 Jan 2017 04:55:00 +0000

cd

sudo apt install virtualenv

virtualenv -p /usr/bin/python3 py3wt

source py3wt/bin/activate

pip install wagtail

wagtail start gchen

cd gchen

setup database

sudo apt-get install postgresql-client

sudo apt-get install postgresql postgresql-contrib
sudo apt-get install pgadmin3

sudo apt install libpq-dev

sudo -u postgres psql postgres

sudo apt-get install python3-dev

\password postgres

sudo -u postgres createdb gchen   (gchen is the database name)

pip install psycopg2

python manage.py migrate

python manage.py createsuperuser
python manage.py runserver

==

connect to database

sudo -u postgres psql postgres

(username postgres, databasename postgres)

=====

change password:

alter user postgres password 'postgres';

=======
list database
\l

=====

deployment
sudo apt install supervisor
pip install gunicorn
python manage.py collectstatic

====
sudo apt install nodejs

Set up Ionic in Mac OS X Yosemite

noreply@blogger.com (Anonymous) — Sun, 28 Jun 2015 13:23:00 +0000

1. Here is the official guide: http://cordova.apache.org/docs/en/3.3.0/guide_platforms_ios_index.md.html#iOS%20Platform%20Guide

2. Go to App Store, download Xcode and install it

3. Open Xcode

4. Xcode Menu → Preferences → Downloads → Components → iOS 8.2 Simulator (there are a few others, so pick iOS 8 that can run on iPhone 6)

5. Install Xcode Command Line Tools: Open a Terminal, type “xcode-select —install”

6. Install nodejs, https://nodejs.org/download/, downlod “Mac OS X Installer (.pkg)”, open the download file and follow the installer to install Nodejs

7. Install cordova tool chains, open a Terminal, and type “sudo npm install -g cordova”

8. In a terminal, create a sample app, type “cordova create hello com.example.hello HelloWorld”

9. In the termial, go to your hello app, “cd hello”

10. In the termial, specify your build target, type “cordova platform add ios” (target is ios here, others like android, firefox, kindle fire, blackberry etc..)

11. In the termial, ready to build the project, type “cordova build”

12. Use Xcode IDE and ready to develop, so double clicking “hello/platforms/ios/HelloWorld.xcodeproj” (or a file ending with .xcodeproj)

13. There is a “Play” symbol/button on the Xcode IDE, you can click it and Xcode will launch the iOS simulator running your ionic Hello app.

14. And the rest is iterating your code and build. That is, modifying your project in Xcode, building your project in a terminal with “cordova build”, then click the “Play” button to test

BeagleBone Black

noreply@blogger.com (Anonymous) — Fri, 18 Oct 2013 03:00:00 +0000

Compared with Rasparry Pi, Beaglebone Black looks more developer friendly and more powerful. Remember to order extra hardware (temperature sensor,sound buzzer, LEDs, simple LCD screen,power supply etc) with your Beaglebone Black together, so you can use your Beaglebone to control them.

You will pay around $120, nice price to pay for teaching yourself embedded programming. For example, write your own electronic thermometer. :)

BCD Adder (Binary-coded decimal)

noreply@blogger.com (Anonymous) — Sun, 10 Feb 2013 21:18:00 +0000

Binary Code Decimal (BCD) Adder.

This is a tool that helps you add two decimals as BCD.

Why is BCD adder useful?

Double and Float sometimes do not meet the requirement of precision. For example, you cannot hold more than 17 digits in double.

With this BCD adder, you can add numbers with 10^18 digits!

Source: https://github.com/crystalcoding/HappyHacking/tree/master/BCD/bcd_gui

Download (windows binary): http://dl.dropbox.com/u/58798915/release-BCD-v0.9.zip

FreeNAS GUI Update

noreply@blogger.com (Anonymous) — Mon, 14 Jan 2013 21:16:00 +0000

FreeNAS (GUI) Web-based upgrade from 8.3.0 Release to 8.3.1 Beta2

1. Back up the configuration “System → Settings → General → Save Config”

2. Download the *.txz file. Upload it through the GUI, Remember to specify the checksum.

3. Take about 5~10 minutes flashing the USB key, the machine reboots once, and I manually reboot it again

Old services are up and running after the upgrade. (Say the old config are good)

reference
http://doc.freenas.org/index.php/Upgrading_FreeNAS%C2%AE

When there is update available for your computer...

noreply@blogger.com (Anonymous) — Sat, 12 Jan 2013 05:47:00 +0000

DeJaVu ? :p

Thanks James :D

noreply@blogger.com (Anonymous) — Tue, 08 Jan 2013 17:39:00 +0000

The first time in my life that I have to read the manual to use a keyboard. (a mechanical one)

Learn a few things about mechanical keyboards. (do I really need the USB polling rate < 1000Hz/1ms response time) I like the touch. It feels right even after I switched from a old keyboards I've used for months.

Also CoolerMaster is a Taiwan-based company? A little surprise.

The LED backlight is also very useful. Usually my room is very dark at night.

Got it yesterday night. Awesome gift from James. Definitely a great product which will last for years.

Serbian Recipies

noreply@blogger.com (Anonymous) — Mon, 12 Nov 2012 00:33:00 +0000

Today Srđan prepared Bison-Meat-with-Rice-inside-Red-Pepper, yummy. He is my roommate studying mechanical engineering @ UoR in the USA. He claimed this is the first time he tried this Serbian recipe.

First time and successful? How come? I guess it is because he speaks Matlab. Another example that coders can learn new things effectively. xD

Python, Dropbox API File Size Mismatch Bug Under Window

noreply@blogger.com (Anonymous) — Sun, 09 Sep 2012 14:36:00 +0000

The following Python code will simply upload a file using Dropbox API. This works will under Linux. However, the code will break if you use it under Windows platform.

Do you see the bug?

The bug is at line:

f = open('working-draf.txt')

This may or may not work. Because it is not open as a binary file. Dropbox has a utility that will complain how many bytes it read is not equal to the file you are trying to send with the client.puf_file() call.

To fix it, simple put:
f = open('working-draft.txt', 'rb')

Open the file in binary mode ! This will get rid of file size mismatch assertion.

Happy Dropboxing.

noreply@blogger.com (Anonymous) — Sat, 18 Aug 2012 18:31:00 +0000

Kindle Touch 要怎麼換回英文

1. 按 home 按鈕，回主頁
2. 按 menu (右上), menu 會彈出
3. 按 setting (從下數上來第二個)
4. 按 device option (從下數上來第二個)
5. 按 language and dictionaries (從下數上來第一個)
6. 按 language (從上數下來第一個)
7. 按 english (united states) (從上數下第三個)
8. 按 ok (在同一頁，右下), 按後確定會彈出
9. 按 ok (右)
10. kindle touch 會 restart

Kindle Touch 怎麼重設

noreply@blogger.com (Anonymous) — Wed, 08 Aug 2012 13:25:00 +0000

老爸，

網上看一堆美國人用kindle也是不小心選到西斑牙文.

很簡單你可以重設Kindle:
(不是英文也沒關係因為其它語言也是這樣設)

1. 選項-> 2. 設定 -> 3. 選項 -> 4. 重設 -> 5. 確定

你就照下面youtube 的教學去touch

1. 右上角按 "選項"
http://youtu.be/UwEx4dTj5Dw?t=1m5s

2. 按"設定" (從下數上來第三個選項)
http://youtu.be/UwEx4dTj5Dw?t=1m10s

3. 再按右上角"選項"
http://youtu.be/UwEx4dTj5Dw?t=1m20s

4. 按"重設" (從下數上來第四個選項)
http://youtu.be/UwEx4dTj5Dw?t=1m29s

5. 在yes, no視窗，按yes
http://youtu.be/UwEx4dTj5Dw?t=1m32s

HTTP Authentication for Django VirtualHost

noreply@blogger.com (Anonymous) — Sat, 14 Jul 2012 12:42:00 +0000

If you want to protect a virtualhost with Django, you can use http basic authentication. The question is how to protect your test site but not the production site (assuming they are both on the same server). Here is how to do it:

First generate your htppasswd file:

#htpasswd -c htpasswd user_name

assume we put the file in

/home/myusename/htpasswd

Second, assume the site you want to protect is called test.mysite.com on port 80

Put the following for your http configuration. In Ubuntu, it will be a file in your /etc/apach2/sites-enable/ directory

setEnvIfNoCase HOST ^test\.mysite\.com\.?(:80)?$ PROTECTED_HOST

#put this in your location directive

AuthUserFile /home/myusername/htpasswd

AuthType Basic

AuthName "this site is password protected :)"

Order Deny,Allow

Satisfy any

Deny from all

Require valid-user

Allow from env=!PROTECTED_HOST

This configuration, will pop up password for test.mysite.com on port 80.

Django, Force Https on Django Admin in Apache

noreply@blogger.com (Anonymous) — Wed, 18 Jan 2012 04:32:00 +0000

Encrypt all network traffic going through Django admin pages.
i.e. All pages http://yoursite.com/admin/ANY_PAGES will be redirected to
secure pages https://yoursite.com/admin/ANY_PAGES

Just add a redirect match to your httpd.conf file. For example, in Ubuntu (/etc/apache2/sites-available/your_config_file) you can do:

RedirectMatch ^/admin.* https://yoursite.com/admin

Integrate Nginx Monitoring into Monitis.com

noreply@blogger.com (Anonymous) — Sun, 15 Jan 2012 01:48:00 +0000

When you are looking for a web server which is highly scalable with low memory footprint, Nginx can be your winning candidate. Nginx is well-known for its ability to deliver static content with efficient use of server resources. Nginx is also lightweight compare to Apache, and Nginx can handle concurrency very well. To appreciate Nginx's power, Nginx comes with a module called stub_status, which allows you to monitor the server statistics in real time. Here is an example of the output once you enable the stub_status module:

Active connections: 291
server accepts handled requests
  16630948 16630948 31070465
Reading: 6 Writing: 179 Waiting: 106

However, the information Nginx provides above is a bit cryptic. Furthermore, if you need to monitor several Nginx servers, things can quickly go out of control. Isn't it nice for systemadin to have the stats organize into columns? Better yet, can we keep tracking all stats continuously with a nice graph?

Monitis (https://www.monitis.com/), a hosted statistics and monitoring provider, can organize those Nginx statistics for you. Once you have a Monitis account, you can create several custom monitors, and track several Nginx servers at once. Everything is inside your Monitis Dashboard. We've demonstrated the solution for Integrate Apache Monitoring into Monitis.com. Today we'll show you how to achieve this for Nginx.

Figure 1: Monitis shows a nice graph for Nginx Stub Staus.

Figure 2: Monitis provides a cleaner output for Nginx Server Stats.

Automatically Feed Nginx Statistics to Your Monitis account

Let's quickly show an available program to do this. In 5 steps, you can fetch your Nginx stats and send them to your Monitis account periodically.

1. You Nginx stub_status module is installed.

2. Edit your nginx.conf, so that Nginx knows the url for stats. Here we use port 80, listen on localhost with address of nginx_status. i.e.

    server {

        listen       80;

        server_name localhost;

        location /nginx_status {

        stub_status on;

        access_log   off;

        allow 127.0.0.1;

        deny all;

        }

i.e. with the configuration above, you can view the original Nginx stats @ http://localhost/nginx_status

3. Start your Nginx Server with Stub Status enable

4. Download the code and run the program.(required .Net 3.5+)

On your windows command line, run the program like this:

monitis_nigix_stats.exe "[apikey]" "[secretkey]" "[monitorname]" "[minitortag]" "[nginx stub status url]"

For example,assume you already have a Monitis account:

monitis_nginx_stats.exe "14NAC40PIMSUEEBQFJOQL18T5U" "74H6U7A2DG71JU80QR48FEOPAL" "Nginx Monitor" "Nginx+Stub+Status" "http://localhost/nginx_status"

*note: please register to get your free apiKey and secreKey from Monitis

https://www.monitis.com/free_signup.jsp

5. Log in to your Monitis account, you can see a new custom monitor ready to be added (Monitors->Manage Monitors->Custom Monitors). Check and add your new monitor to your dashboard.

6. You are all set.

Conclusion:

In this article, we demonstrate Monitis' enterprise solution in Nginx monitoring. Now statistics from Nginx are eye-candy to view, and we can gather data from several Nginx servers in a single dashboard. The code example above is in C#. However, Monitis provides opensource library (SDK) and scripts available for your custom monitors. You are free to pick a SDK in your favorite language, or simply integrate the already working script with your Monitis account. Get your free registration at https://www.monitis.com/free_signup.jsp

Happy Nginx monitoring!

The Monitis Team

External Scripts:

Nginx Monitoring in Python

https://github.com/crystalcoding/Monitis-Scripting/tree/master/python

Nginx Monitoring in C#

https://github.com/crystalcoding/Monitis-Scripting/tree/master/csharp

External Links for further information:

http://monitis.com/api/api.html#addCustomMonitor

https://www.monitis.com/free_signup.jsp 25 Apache Performance Tuning Tips

You Are the Apple of My Eye

noreply@blogger.com (Anonymous) — Sat, 10 Dec 2011 16:03:00 +0000

Qt Djvu, Short Template to Extract Target Line in Current Directory

noreply@blogger.com (Anonymous) — Wed, 07 Dec 2011 01:52:00 +0000

It's a boilerplate for reading and parsing files.

Just throw in your "process" interface that can do

all the heavy duty work.

The code can:
1. read all files in the current directory
2. extract all lines which contain http://

http://code.google.com/p/mixtools/source/browse/trunk/qt/extract_url_in_files.cpp

OpenSource, JUCE C++ Library

noreply@blogger.com (Anonymous) — Wed, 30 Nov 2011 17:41:00 +0000

JUCE is another nice C++ Framework besides Qt.
It is quite feature-rich. GUI, Socket, and even Multi-media.
And it's Cross-Platform under Linux, Mac and Windows :)
Check it out here
http://www.rawmaterialsoftware.com/juce.php

Python Djvu, Get Miku's Life Concert From YouTube (25lines)

noreply@blogger.com (Anonymous) — Sat, 19 Nov 2011 20:10:00 +0000

The code link is here.

OpenSource, Text-To-Speech/SingingSynthesizer

noreply@blogger.com (Anonymous) — Sun, 13 Nov 2011 23:08:00 +0000

Hatsune Miku is one of the best singing synthesizer. It is getting popular in the United States as well. (you type, Miku sings)

For opensource solution, Linux has several text-to-speech packages that work out-of-the box too. Do not overlook accessibility software, they can be amazing.
https://wiki.ubuntu.com/Accessibility/doc/LanguagesAndSpeechSynthesis

Say Hello World in your Linux terminal:
# espeak -v en "Hello World"

JQuery Fundamentas by Rebecca Murphey

noreply@blogger.com (Anonymous) — Sun, 13 Nov 2011 02:57:00 +0000

HTML5 is attracting more and more attention. I am very excited to see major browsers implement HTML5 in the future, just like C++11 becomes an improved standard and it gives a great boost for the C++ community and compiler writers.Yes standard is slow to finalized, but it does pay off in the long run. Now HTML5+CSS+Javascript present great potential, and Adoebe announce they will not support flash in mobile devices but heavily invested in HTML5.

Javascript therefore becomes an important tool for web developers/designers. It is not as clean as Python/Ruby but Javascript can do amazing stuff. You can build an javascript application, and ready to ship instantly on major browser. Learn to write clean javascript, regardless which javascript framework you might pick later.

JQuery Fundamentals

Rebecca Murphey has a nice article on JQuery. It's hard not to use javascript with JQuery nowadays. I like the article. The content is rich, but still a quick read from start to end.

http://jqfundamentals.com/

Also spend a few minutes reading the JQuery source. It's a great library coded with efficiency in mind.
http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js

Learn how to write, debug, build efficient code in web browsers. Stick to the standard while you can, they won't disappear overnight. :)

FreeBSD Binary Update && Security Patch

noreply@blogger.com (Anonymous) — Tue, 04 Oct 2011 03:12:00 +0000

It is very easy to keep your favorite FreeBSD system up-to-date. You can secure your kernel, base system, and third-party software easily!

Secure Your FreeBSD Base System:
#freebsd-update fetch install
*you might want to rebuild all your ports after you update/upgrade your base

Secure Your FreeBSD ports:
#portaudit -Fda
#portupgrade the_package_name_you_want_to_update

Acer Aspire Wireless Network in FreeBSD 8

noreply@blogger.com (Anonymous) — Sat, 01 Oct 2011 16:27:00 +0000

FreeBSD 8 supports Brodcom wireless network card. Get it to work within 10 minutes.

1. get kernel source
2. prepare your driver
3. configure your network card

Run sysinstall to get kernel src:
#sysinstall -> post install-> Distributions: get kernel src for everything

#prepare your Brodcome driver
cd /usr/src/sys/modules/bwi/ && make install
cd /usr/ports/net/bwi-firmware-kmod && make install clean
#you might need to get the package of /usr/ports/net/bwi-firemware-kmod from another media

/boot/loader.conf
wlan_wep_load="YES"
wlan_ccmp_load="YES"
wlan_tkip_load="YES"
bcml5_sys_load="YES"
if_bwi_load="YES"

reboot
(#ifconfig will show bwi0)
test:
ifconfig wlan0 create wlandev bwi0
ifconfig wlan0 up scan

/etc/wpa_supplicant.conf
network={
ssid="your_router_ssid_here"
psk="your_password_here"
}

/etc/rc.conf
wlans_bwi0="wlan0"
ifconfig_wlan0="WPA DHCP"

at least, you can reboot or restart your networking by:
# /etc/rc.d/netif start

Do not forget to press your wireless button if your wireless is turned off!

(The acer laptop wireless button in the front )

Enjoy wireless networking in FreeBSD!

Ubunt Easy Partition during Installation

noreply@blogger.com (Anonymous) — Sat, 01 Oct 2011 16:15:00 +0000

It is tempting to install Ubuntu using the "entire disk". One of the drawbacks is you will lose your data if you reinstall Ubuntu again. (e.g. fix broken ubuntu or you simply want a fresh install)

The easiest way to store your personal files and configuration is to have a "/home" partition during installation. You can think /home as "My Documents" under Windows. Now you will need to install your Ubuntu on the "/" partition. You can think of "/" as "C:" under Windows. You will need at least 2GB for the "/" partition. However, if you plan to install some programs, Ubuntu recommends you to get at least 8GB for the "/" partition. Also make sure you have a swap partition which is the same or double the size of your RAM.

In summary, you can have the following configuration for your disk partition:

/ --> 16GB or more

/home --> the rest goes to here

swap --> 2GB

Reference:
https://help.ubuntu.com/8.04/switching/installing-partitioning.html
https://help.ubuntu.com/8.04/installation-guide/i386/partition-sizing.html