What is NAT - Network Address Translation?

http://www.howstuffworks.com/nat.htm

Why to make TCP Faster?

http://googlecode.blogspot.com/2012/01/lets-make-tcp-faster.html

Backbone Resources

http://www.quora.com/What-are-some-good-resources-for-Backbone-js

How to add Repository to Ubuntu?

Here is the example of how to add a repository to ubuntu machine using apt-get;

  sudo add-apt-repository ppa:jerome-etienne/neoip
  sudo apt-get update
  sudo apt-get install phantomjs

Maven for Javascript and Scala

Maven for Scala:
http://www.scala-lang.org/node/347
http://scala-tools.org/mvnsites/maven-scala-plugin/

Maven For Javascript:
http://mojo.codehaus.org/javascript-maven-tools/
http://blog.akquinet.de/2011/02/11/mavenizing-javascript-projects/

Continuous Integration for JavaScript
http://eriwen.com/tools/continuous-integration-for-javascript/

Useful Tools:
http://ofilabs.com/eightpack/download/

XMPP Library for Android

http://dev.jabbim.cz/ajabbim/browser/trunk/src/cz/jabbim/android/tools

Install ANT 1.8.2 using Ubuntu OS Apt-get

Ant is a Java based build tool, similar to make, but with better support for the cross platform issues involved with developing Java applications. Ant is the build tool of choice for all Java projects at Apache and many other Open Source Java projects.

Install ant 1.8.2 using PPA on ubuntu
Open the terminal and run the following commands

sudo add-apt-repository ppa:eclipse-team/debian-package
sudo apt-get update
sudo apt-get install ant

Chrome Hidden Pages - chrome://about

http://blog.bitbytebit.co.uk/6-chrome-aboutconfig-alternatives-hidden-pages/

1. about:about
2. about:appcache-internals
3. about:blob-internals
4. about:view-http-cache
5. about:credits
6. about:conflicts
7. about:dns
8. about:flags
9. about:gpu
10. about:histograms
11. about:memory
12. about:net-internals
13. about:plugins
14. about:stats
15. about:sync-internals
16. about:tcmalloc
17. about:terms
18. about:version

JSDOC Documentation Help

http://en.wikipedia.org/wiki/JSDoc

http://usejsdoc.org/about-getting-started.html
http://jsdoc-toolkit-rst-template.readthedocs.org/en/latest/index.html

https://github.com/micmath/jsdoc

Javascript Documentation

http://jquery.bassistance.de/docTool/docTool.html

http://dailyjs.com/2011/01/13/framework-part-46/ 

jsdoc 3
https://github.com/micmath/jsdoc

http://usejsdoc.org/about-getting-started.html

http://pdoc.org/syntax.html 

MVC Using Javascript

MVC Javascript :
http://javascriptmvc.com/
http://michaux.ca/examples/to-do-application
http://angularjs.org/#/
http://candy-chat.github.com/candy/

Ejabberd Guide and Installation

https://git.process-one.net/ejabberd/mainline/blobs/raw/v2.1.10/doc/guide.html#htoc4

Steps to Enable Web Admin Login Using Ejabberd

How to enable web Interface under ejabberd? 

{5280, ejabberd_http, [
                         captcha,
                         http_poll,
                         web_admin,
                        {request_handlers, [{["users"], mod_available_user}]}
                        ]}

$ ejabberdctl restart 

ejabberdctl register admin localhost password 

( ex. ejabberdctl register admin localhost xyz987)

access url : http://localhost:5280/admin 

Web Interface will look something like this:

ejabberd Web Admin Interface

How to upgrade Hadoop?

http://www.michael-noll.com/blog/2011/08/23/performing-an-hdfs-upgrade-of-an-hadoop-cluster/

How to install Ejabberd on Ubuntu

http://ndpar.blogspot.com/2010/02/installing-ejabberd-on-ubuntu.html

How to create Multi User Conference under Ejabberd

The ejabberd mod_muc source is under src/mod_muc in the ejabberd source code, see: https://github.com/processone/ejabberd/tree/master/src/mod_muc.

Nothing looks wrong with your example code, you may also need to call mod_muc_room:start/7 after creation.

I would recommend using ejabberdctl debug on a developemnt ejabberd server & try these functions directly.

editor for nodejs

Nide, a very nice browser-IDE

Example for Hadoop WordCount

http://wiki.apache.org/hadoop/WordCount

Common Error While Formatting Hdfs

Typical Error 

ERROR namenode.NameNode: java.io.IOException: Cannot create directory /app/hadoop/tmp/dfs/name/current
    at org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.clearDirectory(Storage.java:297)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1219)
    at org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1238)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:1038)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1145)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162)

How to solve it :

sudo chown 755 /app/hadoop/tmp

Now we create the directory and set the required ownerships and permissions:

$ sudo mkdir -p /app/hadoop/tmp
$ sudo chown hduser:hadoop /app/hadoop/tmp
# ...and if you want to tighten up security, chmod from 755 to 750...
$ sudo chmod 750 /app/hadoop/tmp

If you forget to set the required ownerships and permissions, you will see a java.io.IOException when you try to format the name node in the next section).

Success Case:

*******************************************/
 INFO util.GSet: VM type       = 64-bit
 INFO util.GSet: 2% max memory = 17.77875 MB
 INFO util.GSet: capacity      = 2^21 = 2097152 entries
 INFO util.GSet: recommended=2097152, actual=2097152
 INFO namenode.FSNamesystem: fsOwner=hduser
 INFO namenode.FSNamesystem: supergroup=supergroup
 INFO namenode.FSNamesystem: isPermissionEnabled=true
 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100
 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
 INFO namenode.NameNode: Caching file names occuring more than 10 times
 INFO common.Storage: Image file of size 112 saved in 0 seconds.
 INFO common.Storage: Storage directory /app/hadoop/tmp/dfs/name has been successfully formatted.
 INFO namenode.NameNode: SHUTDOWN_MSG:


refer:

How do you configure sshd_config

http://www.faqs.org/docs/securing/chap15sec122.html

Disabling IPv6

To disable IPv6 on Ubuntu 10.04 LTS, open /etc/sysctl.conf in the editor of your choice and add the following lines to the end of the file:

#disable ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

** Running hadoop on ubuntu linux Single Node Cluster

http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/

Yahoo Open Source Tools and Developer Documentation

http://developer.yahoo.com/documentation
http://developer.yahoo.com/documentation

Install Eclipse on Ubuntu

http://colinrrobinson.com/technology/install-eclipse-ubuntu/

Develop Apps at Ubuntu

http://developer.ubuntu.com/get-started/qt-creator/

http://developer.ubuntu.com/resources/programming-languages/javascript/

http://developer.ubuntu.com/resources/

http://developer.ubuntu.com/get-started/

http://developer.ubuntu.com/get-started/quickly-workflow/

Webrtc Architecture

http://www.webrtc.org/reference/architecture

XML to String Javascript

http://stackoverflow.com/questions/3669551/xmlserializer-to-string-jquery-for-cytoscape

Laymans Understanding of Networking UDP TCPIP

http://www.microshell.com/sysadmin/networking/laymans-understanding-of-networking-udptcpip/

 http://www.tcpipguide.com/free/t_WhyUnderstandingTheOSIReferenceModelIsImportantToY.htm

Install Xrdp to Support Rdesktop Connection on Ubuntu

sudo apt-get install build-essential libpam0g-dev libssl-dev x11vnc vncviewer fakeroot checkinstall x11vnc

Oauth using Javascript

http://derek.io/blog/2010/how-to-secure-oauth-in-javascript/
http://stackoverflow.com/questions/1221371/application-that-uses-oauth-and-javascript

Oauth Authentication 

Learn how to create YQL openTable
http://developer.yahoo.com/yql/guide/yql-opentables-chapter.html

Refer:
https://github.com/soundcloud/SoundCloud-API-jQuery-plugin

oAuth PlayGround
http://googlecodesamples.com/oauth_playground/
https://code.google.com/oauthplayground/


Links:
http://kentbrewster.com/oauth-baby-steps/
http://blog.paulisageek.com/

AWS - SDK 4 Android

http://aws.amazon.com/sdkforandroid/

Javascript REPL

https://github.com/replit/jsrepl

Ref:
einaregilsson.com/repl.html
https://github.com/ivan4th/swank-js
stackoverflow.com/questions/649927/debugging-javascript-repl-style

Important tools while doing a Build

search a package using apt
sudo apt-cache search <application-name>

sudo apt-get install <application name >

for example during build process it says some file are missing;

Under ubuntu you have this <command>
sudo apt-get install apt-file


Additionally apt-file can be used to list all files included in a package without installing or downloading it.

so you can do

sudo apt-file search  gtk+-2.0
and this gives the package name where its located.


Note:
To display hidden file in ubuntu 11.04
crtl-h  on the viewing folder.

other useful utilities

sudo apt-get install nmap
sudo apt-get install samba swat smbclient

Man in the Middle Attacks

http://windowsecurity.com/articles/Understanding-Man-in-the-Middle-Attacks-ARP-Part1.html

ARP cache poisoning, DNS spoofing, HTTP session hijacking, passing the has

Ubuntu : http://manpages.ubuntu.com/manpages/lucid/man8/arpon.8.html

http://windowsecurity.com/articles/Understanding-Man-in-the-Middle-Attacks-ARP-Part1.html

http://windowsecurity.com/articles/Understanding-Man-in-the-Middle-Attacks-ARP-Part1.html

Ubunhttp://windowsecurity.com/articles/Understanding-Man-in-the-Middle-Attacks-ARP-Part1.html

Protocols - Details

http://www.protocols.com/pbook/tcpip1.htm

Scala Must know base Understanding

• Setting up the development environment
  • Installing the Scala distribution
  • Installing Eclipse and the Scala plugin
  • Installing sbt
• Bootstrapping
  • Initial state of the ScalaTrain case study
  • Short recap of important basics
• Functional programming in depth
  • By-name parameters
  • Local methods
  • Recursion and tail recursion
  • Partial functions
  • Currying
  • Partially applied functions
  • The power of folding
• Mastering the type system
  • Type parameters
  • Variance
  • Lower and upper bounds
  • Type members
  • Path dependent types
  • Refinements and structural typing
  • Phantom types
  • Self types
• Explicitly implicit
  • Implicit conversions
  • Implicit parameters
  • Type classes
  • View bounds
  • Context bounds
  • Manifests
• Internal DSLs

Google JavaScript Style Guide

http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml

Design program - An Introduction to computing and programming

http://www.htdp.org/2003-09-26/Book/curriculum-Z-H-5.html#node_sec_2.5
http://www.htdp.org/2003-09-26/Book/curriculum-Z-H-5.html#node_sec_2.5

Open Data Protocol

http://www.odata.org/

Domain Specific Language

http://www.slideshare.net/p3t0r/domain-specific-languages-in-scala-duse3
http://www.infoq.com/presentations/domain-specific-languages

Domain Specific Language

http://www.infoq.com/presentations/domain-specific-languages

Scala IDE

http://scala-ide.org/

Scala and Typesafe

http://typesafe.com/resources/documentation

Javascript Library

http://nooshu.com/

MIT OpenSource

http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/

Get Education course from MIT

http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/

How to build Simple Android Applications

http://www.vogella.de/articles/Android/article.html
http://developer.android.com/resources/tutorials/hello-world.html
http://mindtherobot.com/blog/272/android-custom-ui-making-a-vintage-thermometer/
http://marakana.com/forums/android/general/240.html
http://developer.android.com/guide/topics/ui/declaring-layout.html


http://stackoverflow.com/questions/2992754/ui-design-tips-and-tutorials-for-android
http://mobile.tutsplus.com/tutorials/android/android-sdk_fragments/
http://www.androiduipatterns.com/2011/05/anti-pattern-tutorial-screen.html