Soum Sareuon's Blog

How to check your ubuntu distribution

2011-03-14T20:31:00.000-07:00

Knowing your distribution is help to install package that is suitable for your box. This command will help you to find out what is your Ubuntu distribution.

cat /etc/*-release

Find Process Id in Ubutu

2011-01-27T19:01:00.000-08:00

Many times that I have problem with how can I stop the background process of some app like tomcat, geoserver, ruby....

Ok, I found that we can use command $ps aux | grep tomcat

the returning result is here.

1000 2957 0.0 0.0 3044 800 pts/1 S+ 10:05 0:00 grep --color=auto tomcat

so on the return result I realize that the process is of tomcat is "2957".

then I can kill it by run $sudo kill 2957

Kills Backgroud Process On Ubuntu

2011-01-27T18:52:00.000-08:00

I run Geoserver on port 8080 in background process, I wish to stop it so I have to run command:
1-$sudo netstat -lpn | grep :8080
then it will reply some think like here.

tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 1847/java

2.then I found that geoserver on my box have process id 1847 so. I can kill it by run
$sudo kill 1847.

it done.

ShareVisoin: Web Mapping

2011-01-26T02:23:00.000-08:00

Hi there this is my slide at HackerSpacePP, on 22 jan 2011.

Web mapping

View more presentations from Sareuon Soum.

Open Tech-Talk on Web Mapping

2011-01-17T05:33:00.000-08:00

There are a lot of people using they browsers to suff information on the net, also today technology you can use web map to show the location of restaurants, museums, and art venues. A business can post a map for reaching its offices. The state government can present a map showing average income by area.

Most of you already use web map but don't really know the process and accompanying tools for creating and publishing on-line maps. Ok, on 22 January 2011, at HackerSpacePP we have Open Tech-Talk organize by ShareVisoin Team Iḿ going to have a talk on the process of designing, implementing, generating and delivering maps to www.

So see you there!

Sacla Function Literal

2009-09-08T18:18:00.000-07:00

Scala is programming language for who have skill with java and ruby. With Scala you write small script to build larges system. Scala support full Functional Programming and pure OOP.
Scala you can write down functions as unnamed literals and then pass them around as values(runtime).

(x: Int, y: Int) => x + y

The => designates that this function converts the thing on the left (any integer x,y) to the thing on the right (x + y).

List(1,2,3).filter(x => x % 2 == 1)

Inheritance

2008-10-16T20:22:00.000-07:00

In Oop languages, Inheritance can help you to reduce the duplicate code and make objects as loosely coupled.
So this is how to do Inheritance in javascript. Let see the code below:

//Supper Class
Input = function(a, b){
var _a = a;
var _b =b;

this.getA = function(){
return _a;
};

this.getB = function(){
return _b;
};
}

//Concrete Class
Sum = function(a, b){
Input.apply(this,[a,b]);

this.getSum = function(){
return (this.getA() + this.getB());
}
}

//Implementation

var mySum = new Sum(2,3);
alert(mySum.getSum();

Set up Khmer fonts

2008-09-16T03:29:00.000-07:00

Hi, this is my first article for my blog. This is about how to setup khmer fornts on ubuntu both true type fonts and unicode. To install khmer fonts you can do following :

Copy the fonts files from Microsoft Windows (C:\Windows\Fonts) or you can download it from internet by searching on google, yahoo or the other search engine.
Create new folder to store new fonts in " /usr/local/share " Ex. cambodia and place all copy's fonts you wish to install on this new folder.
Open terminal ( Application -> Accessories -> Terminal) the type $sudo fc-cache -fv to clear cache.
To be able to type unicode in ubuntu go to (System -> Preferences -> Keyboard -> Layouts ->Add ) from Layouts select cambodia and click Add
After you Add cambodia keyboard you can set Layout Options and chose you favorite Layout switching