Short how-to to have Asterisk handle Yes 4G - both as outgoing trunk and incoming. Tested under CentOS 5.7, Asterisk 1.8.7.0.

You will need access to Yes Life iOS app (or any IP traffic analyzer if you are using Yes Life for Windows), and know how to build Asterisk from source.

1. Figure out your Yes authorization name and SIP server. Your Yes ID is different from your Yes authorization name. To find out your authorization, launch Yes Life for iOS. Go to "More" tab and tap on "System Log". Swipe the "ON" button to turn on Yes Life logging.

Simple script which will fetch latest delegated IP, filter it by country (this script only returned IP registered to Malaysian entity), and return the complete address in CIDR. Tested only with APNIC, so might need modification for use with other registry.

SQLite is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine. The primary benefits of using SQLite is that you can create a self-contained database in your application.

What is so great about this? Well, for starters you can:

• Manipulate data inside your program using standard SQL construct.

• Zero database configuration – but you get database-like capabilities for your program.

Put it inside your server { } segment. For example, to redirect all user accessing www.idontlikewww.com to idontlikewww.com, the following config snippet will work.

if ($host = 'www.idontlikewww.com' ) {
    rewrite  ^/(.*)$  http://idontlikewww.com/$1  permanent;
}

Self-notes...after spending a few hours researching and benchmarking various configurations. Apache is so old news.

Setup:

• Ubuntu Lucid Lynx (10.04)
• nginx as frontend webserver
• Drupal served using fastcgi to phpcgi
• ...and Drupal's Boost module.

Most of these configs is gathered from http://groups.drupal.org/node/26363.

How fast is it now? How about almost 6,000 requests/sec, with throughput around 240Mbps? Fast enough?

Encountered this error when I tried to upload a large file. nginx default is too small. To upload bigger file, add this line in /etc/nginx/nginx.conf, somewhere inside the http section:

http {
    ....
    client_max_body_size 20M;
    ....
}

Save, and then restart your nginx instance.

I'm running Ubuntu 7.10 using custom 2.6.23.11 kernel. Somehow, starting from kernel 2.6.23, VMware was unable to properly use my Windows Mobile PDA (Atom O2 Life). Every time I plugged in the Atom, VMware will spurt out "VMware Workstation was unable to claim the device" message. The issue was actually with VMware, and not the kernel. Follow the steps outlined below to work around this bug in VMware.

I use VMware a lot, mostly using VMware Workstation 6.0.2 under Linux host. However, from to time, some or all of the modifier keys (Ctrl, Shift, and Alt) somehow ceased to function. Seemed that sometime VMware failed to correctly restore those keys function to X server.

Here's simple command, using xmodmap (installed as part of X base utilities) that will fix this issue. xmodmap is assumed to be located at /usr/bin

1. Download and install the latest version of imapsync at http://www.linux-france.org/prj/imapsync/dist/. As of today, the latest version is 1.255.

Tested under: CentOS 5.2, Ubuntu Intrepid Ibex (8.10), Ubuntu Hardy Heron (8.04), both 32-bit and 64-bit flavors. 

Tested working with the following clients: Windows XP, Windows Vista, iPhone, Mac OS X Leopard.

Linux: Guide on configuring Nokia phone as GPRS / 3G / EDGE / HSDPA modem

NOTE: Some parts of this tutorial is probably outdated.

Linux / Network: Beginners guide to FireHOL.

NOTE: Content of this tutorial is probably outdated.

Part 1

Having firewall is one of the steps you can take to make sure that you machine is a little bit secure. This is achieved by opening access only to application or ports that you explicitly allow, and blocking the rest. This for me is a good practice, although some people might argue otherwise.

I have been using XFS file-system for all my Linux box for quite some time now. XFS have some fancy features such as live file-system defragmenting. Let's cover how to do that.

First, make sure you have the xfsdump utilities install. For Ubuntu or its derivatives distribution, simply issue this command:

sudo apt-get install xfsdump

Then, optionally you can check how fragmented your file-system is by this command:

Introduction

This tutorial highlight the necessary steps to configure Varnish and lighttpd to serve your Plone site. The primary benefit is that you can tremendously improve performance of your Plone. In Bitubique.com case, the stock Plone installation was only able to push up to 13 requests per seconds, but putting Varnish and lighttpd in front push the performance up to 160 requests per seconds. That's 12 times faster than stock installation!

To increase to 100 MB/s, issue this command in terminal as root user.

echo 100000 >/proc/sys/dev/raid/speed_limit_min

Edit or create /etc/xinet.d/yourservicename

E.g. to listen to 443 and redirect to 192.168.2.1 port 22, replace listenport = 443, targetip = 192.168.2.1, targetport = 22.

service yourservicename
{
        disable         = no
        type            = UNLISTED
        socket_type     = stream
        protocol        = tcp
        user            = nobody
        wait            = no
        redirect        = targetip targetport
        port            = listenport
}