Installing OpenStack on AWS

1. Prerequisites – Minimal requirements for hosting in AWS, but not limited to:

  • Ubuntu Server 14.04.3 LTS – 64bit
  • Minimum 2VCPU – Cores
  • Minimum 8 GB RAM for just OpenStack (m4.large), Minimum 16 GB RAM for Sahara and clustering (m4.xlarge)
  • Atleast 40 GB of diskspace

2. Install Ubuntu if you dont have one

3. Verify installed version using

lsb_release -d
free -m
df -h

4. Update to the latest binaries

sudo apt-get update

5. Create a SUDO user – alternatively you can use the /devstack/tools/ to create a user after step 8

sudo -i
adduser stack			
	Enter new UNIX password:
	Retype new UNIX password:
	passwd: password updated successfully
	Changing the user information for username
	Enter the new value, or press ENTER for the default
	Full Name []:stack
	Room Number []:
	Work Phone []:
	Home Phone []:
	Other []:
	Is the information correct? [Y/n] Y

6. Add user to SUDOERs group

usermod -aG sudo stack 
echo "stack ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers

7. Switch to the new stack user

su - stack
check if the user can do sudo operations without password prompts
sudo ls -la /root

8. Switch to user home and install GIT and checkout devstack

cd ~
sudo apt-get install git
git clone

9. Configure devstack – update local.config and move to /devstack

cd /devstack
cp sample/local.conf .

* Update the passwords for the accounts

[email protected]
[email protected]
[email protected]
[email protected]

* If you are running on a physical machine with a static IP you can update the following property. On AWS its better to leave it commented as the local IP will be changed on each restart, unless the Elastic IP is assigned to the instance


* And add the following line at the end of the file. These entries will add the Sahara plugin (Data Processing) in OpenStack UI

echo "enable_plugin sahara git://" >> local.conf
echo "enable_plugin sahara-dashboard git://" >> local.conf
echo "enable_plugin ceilometer git://" >> local.conf

10. Start the stack services


* This takes up sometime and logs will be available at /opt/stack/logs. On successful completion you will find details something similar as below.

DevStack Component Timing
Total runtime         1169
run_process            57
test_with_retry         3
apt-get-update          3
pip_install           299
restart_apache_server  10
wait_for_service       11
git_timed             244
apt-get                69

This is your host IP address:
This is your host IPv6 address: ::1
Horizon is now available at
Keystone is serving at
The default users are: admin and demo
The password: [email protected]
[email protected]:~/devstack$

11. To access the dashboard hit in browser (with the ip as displayed in the above step). If you are running in local PC you can directly access with the above url. But if you are running on AWS, this is the internal IP and will not be available to the outside world. In this case, allow HTTP access on 80 port for the outside world and access the service with the Public IP or DNS hostname allocated to your instance. This in my case

Must have Android apps for developers (Non Android developers)

The below list of apps are note rated or ordered in any ways.

1. AndroIRC – An IRC client application
2. Chrome – Mobile browser
3. Mozilla Firefox – Mobile browser
4. SSH/SFTP Server – Exposing your mobile as a SSH/SFTP server
5. AndFTP – FTP client
6. JuiceSSH – SSH client
7. aLogcat/aLogrec – Logger apps to view or save Android logs
8. Network Info II – Shows info about the phone and the current network, Bluetooth, IPv6 and Cell connection
9. kWS – Android Web Server
10. Google Analytics – Mobile client for Google Analytics
11. WordPress – Mobile client for WordPress dashboard
12. Control Panel for cPanel – Mobile client for cPanel Dashboard
13. File Expert – All in one File manager supporting Windows Samba, FTP, SFTP, FTPS, Webdev, Bluetooth OBEX client

Note: The above app list is used by me and has nothing to do with the other users.

Setup your own Social Networking Websites

There a lot of social networking site available in web which includes the Google Plus, Facebook, Twitter etc. Its public and the open to all. But if you wish to Setup your own Social Networking site that is private and for a closed group you can use one of the following Open source scripts.

1. Elgg: Elgg empowers individuals, groups and institutions to create their own fully-featured social environment. Elgg, started in 2004, is an open source social engine which powers all kinds of social environments – from education and business to martial arts and rugby. If you are looking for a professional social intranet or want to run a site for your organisation, Elgg is a great choice. Click here to download.

2. Dolphin: Dolphin is the world’s most advanced community software. Open-source, independent, downloadable, scalable, customizable, full-featured, free software for building social networks, dating sites and web-communities. Loaded with video chat, recorder, video player, forums, groups, events, video messenger, mailbox, desktop app, video sharing, photo sharing, iPhone app and much more. Build your own business or advance your hobby with Dolphin!. Click here to download Dolphin.

3. Jcow: Jcow makes it easy & interesting to create Social Networks and online communities, Build a member community for your existing website, Build a social networking site like facebook/myspace/twitter. Click here to download JCow.

4. Etano: Etano can be used to start up a dating site, a social networking site, a classifieds site or any other type of site involving groups of people, companies, products. Click here to download.

5. Oxwall: Oxwall is used for a wide range of projects starting from family sites and custom social networks to collaboration tools and enterprise community solutions. Oxwall is unbelievably flexible and easy to use PHP/MySQL community software platform. Click here to download.

6. PeoplePods: PeoplePods is a framework that makes it easier to create community or “social” applications. It provides a flexible infrastructure within which members of a site can create, comment upon, and consume content of arbitrary types. Popular social functionality such as friend lists, personalized content views, bookmarking, and voting are automatically available within any PeoplePods application. PeoplePods can be used to build stand-alone sites, or can be layered onto existing sites such as those run using WordPress or other PHP applications. Click here to download.

7. Beatz: Beatz is a free opensource online social networking community script that allows you to start your own favourite artist band website just like Pure Volume. The script is coded in Php, Mysql and licensed under Creative Commons GPL license. In other words, its an online community script for sharing, discussing and learning about new artists and your favorites. Click here to download.

Open Source Micro blogging applications

Twitter is the most famous Microblogging site used by users all over the world. There are some famous Open source microblogging site available. Following are few among the Open source PHP scripts.

1. StatusNet: Previously Laconica, is the engine which runs the popular microblogging site You can download the same from here.

2. PageCookery: PageCookery is the first public offering of single-user version of the open source microblogging program, PHP + MySQL based architecture is a set of safety, efficiency and stability, to “share”, “discovery” for the concept of Web 2.0 solutions to micro-blog. Click here to download.

3. JaikuEngine: Jaiku was the microblogging site of Google. However, they decided no longer to develop the code but make it open source under the name JaikuEngine.

4. Sharetronix: Sharetronix is the world’s favorite opensource microblogging platform. Sharetronix enables people to exchange ideas and multimedia in real-time. Click here to download.

5. Storytlr: Storytlr offers a single touch point for your online life in your own style. Easily post anything you find interesting, import your web 2.0 stuff and share your life online. Storytlr is an open source lifestreaming and micro blogging platform. You can use it for a single user or it can act as a host for many people all from the same installation. Click here to download.

6. Jisko: Jisko is a light-weight open-source microblogging system that allows you to stay in contact with the people you want. Click here to Download.

7. WordPress: The WordPress is a popular blogging tool. But the Power of wordpress can be derived to work as a Microblogging application with the help of a simple theme. P2 WordPress Theme converts the Powerful WordPress into a Microblogging tool. Click here to download.

8. Yonkly: Yonkly Open Source twitter-clone and microblogging platform developed on the mvc framework. It is the famous Open Source app available in the Dot Net side other than the PHP scripts. Click here to Download.

Printing Complex Layouts in Adobe Flex – FlexPrintJob

I have come across a basic need for printing a complex layout in the Adobe Flex. After a long search i thought the following will be helpful to all if shared.


1. My layout has the following. Header (Fixed, to be shown in all page.), First Page Header (Displayed only in single page), DataGrid with data rolling out to more than one page, Fixed footer following the DataGrid and a Footer that come only in last page of the Printed output.
2. I am given only the outer most component object and list of all ids of the following components.
3. No server side support is available.


1. My DataGrid is not accessible directly.
2. Complex layout and needed Paginationrn3. Fixed, floating header and footers.


With reference to the Adobe Live docs, the solutions is almost near except to the complex structure.
rnI have created a Template that holds all the data to be iterated in the report. I contains the sections like Fixed Header, Floating Header, DataGrid, Fixed Footer, Floating Footer as follows.

1. PrintTemplate.mxml

<s:VGroup id="allPageHeader" width="100%" />
< s:VGroup id="firstPageHeader" width="100%" />
< mx:PrintDataGrid id="printDataGrid" width="100%" />
< s:VGroup id="allPageFooter" width="100%" />
< s:VGroup id="lastPagefooter" width="100%" />

2. PrintSample.mxml

protected function doPrint(outerGroup:DisplayObjectContainer, fixedHeaderIDs:ArrayCollection, floatHeaderIDs:ArrayCollection, dataGridId:String, floatFooterIDs:ArrayCollection , fixedFooterIDs:ArrayCollection):void{...}

Here we have to pass the list of IDs of the sections as we need to the doPrint method as follows.

doPrint(outerGroup, fixedHeaderIDs, floatHeaderIDs, dataGridId, fixedFooterIDs, floatFooterIDs);Completing the rendering the print object will be sent to printer and a popup will be shown.

Source Code: Printing in Adobe Flex


In the above example, if the Printout is taken with the printAsBitmap set to false, then there will be thick line under the header of the DataGrid ie, the PrintDataGrid. To solve this problem you have to use a Header Renderer and set a background color or Image for the header as follows.

<?xml version="1.0" encoding="utf-8"?>
< s:SparkSkin xmlns:fx="http:/" xmlns:s="library:/" xmlns:mx="library:/" > < s:Rect left="0" right="0" top="0"> < s:fill> < s:BitmapFill source="@Embed(''header.png'')"/> 
< /s:fill> < s:stroke> < s:SolidColorStroke color="grey" /> 
< /s:stroke> < /s:Rect>< /s:SparkSkin>

Save the file as SampleSkin and add this skin to the headerBackroundSkin property of PrintDataGrid in the PrintTemplate as follows.

<mx:PrintDataGrid id="printDataGrid" width="100%" headerBackgroundSkin="SampleSkin" />

This will resolve the issue and set a neat header to the DataGrid in the print.

Open Source Softwares – Top alternatives for proprietary softwares – Part 2


Part 1  –  Part 2  


  Famous Proprietary Programs   Open Source Alternatives   Download URL

Mail Servers & Mail Clients
16. Microsoft Exchange Server, IBM Lotus Domino   Zimbra, SoGo, Open-Exchange, OpenGroupware   Zimbra, SoGo, Open-Exchange, OpenGroupware
17. Microsoft Outlook   Evolution, SeaMonkey, Thunderbird, Eudora   Evolution, SeaMonkey, Thunderbird, Eduora

Multimedia, Video & Audio
18. Apple iTunes, Windows Media Player, Winamp   Amaroke, aTunes, SongBird   Amaroke, aTunes, SongBird
19. CyberLink PowerDVD and InterVideo WinDVD   VLC media player, Media Player Classic, MPlayer   VLC media player, Media Player Classic, MPlayer
20. Adobe Soundbooth, Sony Sound Forge   Audacity, Ardour, DarkWave Studio, EcaSound   Audacity, Ardour, DarkWave Studio, EcaSound

21. Internet Explorer, Safari, Opera   Amaya, Mozilla Firefox, Chromium, K-Meleon, Konqueror, Mozilla, Mozilla Firefox, SeaMonkey   Mozilla, Mozilla Firefox, SeaMonkey, K-Melelon, Amaya, Chromium, Konqueror, Google Chrome

Networking Tools
22. Check Point VPN-1, Citrix Presentation Server   TightVNC, UltraVNC, OpenVPN   TightVNC, UltraVNC, OpenVPN
23. CommView   Wireshark, Snort   Wireshark, Snort
24. CuteFTP, FTP Commander   FileZilla, net2ftp, WinSCP   FileZilla, net2ftp, WinSCP

System Tools
25. Nero Multimedia Suit   DVD Flick   DVD Flick
26. Nero Burning ROM   K3B, InfraRecorder   K3B, InfraRecorder
27. Symantec Veritas NetBackup, Nero Back it up and burn   Amanda, Bacula, StorageIM   Amanda, Bacula, StorageIM
28. PKZip, WinRAR, WinZip   7-Zip, The Unachiver, WinUHA, PeaZip   7-Zip, The Unachiver, WinUHA, PeaZip
29. Syamntec Partion Magic, Symantec Ghost   Partimage, Clonezilla   Partimage, Clonezilla
30. VMware Server ESX   VirtualBOx, Cooperative Linux, OpenVZ   VirtualBOx, Cooperative Linux, OpenVZ
Part 1  –  Part 2  

Open Source Softwares – Top alternatives for proprietary softwares

Open source software is software whose source code is published and made available to the public, enabling anyone to copy, modify and redistribute the source code without paying royalties or fees. Open source code evolves through community cooperation. These communities are composed of individual programmers as well as very large companies. Click Here to learn more about Open Source Softwares.

The Open Source softwares get developed rapidly as the development involves developers from individual to lage companies. Thus the Open Source softwares are gaining phase and becoming a competitive products to that of the costly and proprietary softwares in the market. Here is a collection of softwares that stand as the great alternatives to the Proprietary gaints.


Part 1  –  Part 2 
  Famous Proprietary Programs   Open Source Alternatives   Download URL

Operating Systems
1. Microsoft Windows Operating Systems   Linux Distributions (Ubuntu, Fedora, Mandriva etc.), Google Chrome OS, OpenSolaris, and more.   Ubuntu, Fedora, Mandriva, Chrome OS
Office Suites and Tools
2. Microsoft Office Suite, Star Office   OpenOffice, LibreOffice, KOffice, GNOME Office, Feng Office   OpenOffice, LibreOffice
3. Adobe PDF Evince, Foxit Reader, Sumatra PDF Evince, Foxit Reader, Sumatra PDF
4. Mactopia NeoOffice NeoOffice
5. MathWorks MATLAB Scilab Scilab
6. Microsoft Visio Dia, ArgoUM, StarUML Dia, ArgoUM, StarUML
7. Adobe Acrobat PDFCreator, OpenOffice PDFCreator, OpenOffice
Production and Development Tools
9. Adobe Photoshop   Paint.Net, Gimp, GimpShop, Inkscape   Paint.Net, GIMP, GIMPShop, Inkscape
10. AutoCAD Archimedes Archimedes
11. Adobe Dreamweaver NVU (now KompoZer), BigFish, Amaya KompoZer, Last Official Release of NVU, BigFish, Amaya
12. Adobe Flash OpenLaszlo, Synfig Adobe Flex, OpenLaszlo, Synfig
13. UltraEdit-32, EditPlus Notepad++, SciTE, jEdit Notepad++, SciTE, jEdit
14. TruSpace,
Autodesk 3ds Max
Blender Blender
15. Microsoft Project Open Workbench Open Workbench
Part 1  –  Part 2