Siva Prof: February 2012

Wednesday, 29 February 2012

R data and Hadoop

http://www.r-bloggers.com/slides-and-replay-from-r-and-hadoop-webinar/
http://www.revolutionanalytics.com/products/r-for-apache-hadoop.php

http://www.accenture.com/us-en/technology/technology-labs/Pages/insight-webinar-hadoop-data-platform.aspx#self

http://vip.informatica.com/?elqPURLPage=9397

Thursday, 16 February 2012

Seed Programming - Linux Shell Based Development using Javscript

http://en.wikipedia.org/wiki/Seed_(programming)

http://live.gnome.org/Seed
What is seed Programming
sudo apt-get install seed

A program using GTK+

This code shows an empty window named "Example".

#!/usr/bin/env seed
 
Gtk = imports.gi.Gtk;
Gtk.init(Seed.argv);
 
var window = new Gtk.Window({title: "Example"});
 
window.signal.hide.connect(Gtk.main_quit);
window.show_all();
 
Gtk.main();

http://bash.cyberciti.biz/guide/Main_Page

http://www.gtk.org/

http://live.gnome.org/Seed
http://bash.cyberciti.biz/guide/Zenity:_Shell_Scripting_with_Gnome
http://developer.gnome.org/seed/3.2/

http://techbase.kde.org/Development/Tutorials/Shell_Scripting_with_KDE_Dialogs

Development under Ubuntu Environment
http://developer.ubuntu.com/get-started/

Installation Tips and Tricks when Installing Mongodb

Installation of Mongodb

Some of the steps that needs to be considered while installing MongoDb.

Step1:

64-bit Linux binaries

$ # replace "2.0.2" in the url below with the version you want
$ curl http://downloads.mongodb.org/linux/mongodb-linux-x86_64-2.0.2.tgz > mongo.tgz
$ tar xzf mongo.tgz

Step2: ** Very Important

Create a data directory

By default MongoDB will store data in /data/db, but it won't automatically create that directory. To create it, do:

$ sudo mkdir -p /data/db/
$ sudo chown `id -u` /data/db

You can also tell MongoDB to use a different data directory, with the --dbpath option.

** Please note without Step 2; you can not run mongod under Linux or ubuntu environment.

Its very essential to create the data/db, since the current version of mongodb does'nt create a database directory.

if your are home directory

$ cd /usr/local
$ sudo ln -s /home/username/mongo mongodb

$ vim .bashrc
export PATH="$PATH":/usr/local/mongodb/bin

$source .bashrc

Execute the mongodb server
$mongod

Run mongodb server with REST enabled.
$mongod --rest

Access Web Admin Interface:
http://localhost:28017/

How memcached works

http://www.majordojo.com/2007/03/memcached-howto.php

refer:

www.redis.io
http://libevent.org/

Wednesday, 15 February 2012

Online course available at MIT.edu

http://mitx.mit.edu/

Thursday, 2 February 2012

Podcast from stackExchange

http://soundcloud.com/stack-exchange/sets/stack-exchange-podcasts/

Advanced Javascript Techniques

http://ejohn.org/apps/learn/#41

How to install Apache Benchmarking tool - ab

ab(1) Apache HTTP server benchmarking tool

sudo apt-get install apache2-utils

For example if you want to send 10000 request, type following command:
$ ab -n 10000 -c 2 http://www.example.com/

Wednesday, 1 February 2012

How to delete recently used files under ubuntu

Under your ububtu home directory type
$locate recently

/home/username/.icedtea/cache/recently_used
/home/username/.local/share/recently-used.xbel
$vim /home/username/.local/share/recently-used.xbel

search the string and delete the contained <bookmark> tag

means start and end tag.
<bookmark > ... </bookmark>

ex:


<bookmark href="file:///home/username/eclipses" added="2012-01-19T07:4

4:34Z" modified="2012-01-19T07:44:34Z" visited="2012-01-19T07:44:35Z">

    <info>

      <metadata owner="http://freedesktop.org">

        <mime:mime-type type="inode/directory"/>

        <bookmark:applications>

          <bookmark:application name="File Roller" exec="&apos;file-roller %u&ap

os;" modified="2012-01-19T07:44:34Z" count="1"/>

        </bookmark:applications>

      </metadata>

    </info>

  </bookmark>

How to install RVM on Ubuntu

Install RVM:

$ bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)

Reload your shell environment:

$ source ~/.bash_profile

Find the requirements (follow the instructions):

$ rvm requirements

Javascript Conference Videos

http://blip.tv/jsconf

Find Alternative Applications ex. for rsync

http://alternativeto.net/software/rsync/

Typical Pixmap Error during Installation dartLang

Unable to locate theme engine in module_path: "pixmap",
(DartEditor:9771): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
(DartEditor:9771): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
(DartEditor:9771): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

sudo apt-get install gtk2-engines-pixbuf

The power of the Asynchronous Module Definition

2ality - technology, life: The power of the Asynchronous Module Definition: Update 2011-11-19: Bridging the module gap between Node.js and browsers This post explains Asynchronous Module Definition (AMD), a stan...

refer:

Siva Prof