Category Archives: Free Education

Facebook Announced SPDY Support

July 15, 2012 Sangkrit Leave a comment

Facebook has announced SPDY support. Here is Facebook’s response to the call for expressions of interest in HTTP/2.0. Providing faster and more secure online services to users, the features in need for HTTP/2.0 are:

Multiplexing

Transport layer encryption

Zero-latency upgrade

Per-request flow control

Server push

Check Details Here.

What is SPDY ?

SPDY means speedy. It is an experimental networking protocol developed primarily at Google for transporting web content. Its main objective is to reduce loading time of any web page. It modifies the way HTTP requests and responses are sent over the wire.

SPDY transports the web content using fewer TCP connections by multiplexing large numbers of transactions to one TLS connection. Read Mozilla Hacks: SPDY Brings Responsive and Scalable Transport to Firefox 11

GNU/Linux, Technology

Firefox 16 Now Supports HTML5 getUserMedia

July 14, 2012 Sangkrit Leave a comment

Firefox 16 now supports HTML5 getUserMedia. It enables access to webcam without any plugins.

There is an entry in about:config, set that to true. In case you need to add a new entry then:

open about:config
Right click any entry.
Select ‘New‘ >> ‘Boolean‘

Add the following entry and set it true:

media.navigator.enabled

Remember to define callback methods right within the getUserMedia() method as shown below:

navigator.getUserMedia(gumOptions,
function successCallback(stream) {
// Replace source of video element with stream from camera
if(navigator.getUserMedia==navigator.mozGetUserMedia) {
video.src = stream;
} else {
video.src = window.URL.createObjectURL(stream) || stream;
}

video.play();
},
function errorCallback(error) {
console.error(‘An error occurred: [CODE ‘ + error.code + ‘]’);
video.play();
});

It won’t works in-case you defined it elsewhere. No need to use CreateObjectURL to pass the stream the video element. Pass the stream directly. video.src=stream

Paul Rouget of Mozilla, created a video tutorial demonstrating HTML5 getUserMedia:

[iframe][/iframe]

GNU/Linux, Technology, Web Services

Copy Favicon Of Any Website

July 14, 2012 Sangkrit Leave a comment

You can copy favicon of any website by using this URL:

http://www.google.com/s2/favicons?domain=www.yourdomain.com

Just replace the bold letters with the domain name.

For Example:

If you want to copy Favicon of www.sangkrit.net then write it like this in address bar and press enter:

http://www.google.com/s2/favicons?domain=www.sangkrit.net

You will be directed to a page showing favicon of the above given website.

Save it by Ctrl+S on your keyboard.

Use it wherever you want.

Technology, Web Services, WordPress

Embed Flickr & Picasa Photostreams In Web Pages As A Flash Slideshow

July 14, 2012 Sangkrit Leave a comment

Use PictoBrowser for embedding your Flickr – Picasa Photos in your website.

What is a PictoBrowser?

PictoBrowser a free web application that displays Flickr and Picasa images on websites and blogs.

How to get a PictoBrowser?

Visit here
If this link doesn’t work then visit http://pictobrowser.com/
Click PictoBuilder at the top left corner of the page.
Enter your Flickr/Picasa username.
Choose images.
Set Tag or Groups.
It outputs some HTML code
Copy that HTML code and paste it in your website or blog.
If you use WordPress then you may paste it inside your posts and pages.

Technology, WordPress

Adding JavaScript Inside Your WordPress Posts

July 14, 2012 Sangkrit Leave a comment

While writing any post change mode from Visual to HTML and paste your javascript there.

Excluding this there are many plugins available which allows you to add javascript in WordPress posts.

You may try this plugin also Custom fields shortcode. Although this plugin hasn’t been updated in over 2 years but it works good without showing any error in my blog.

Useage:

Use [cf] shortcode in your post content to show the custom field value without editing any of your WordPress theme files.

For Example: [cf] FieldName[/cf] returns value of ‘FieldName’ custom-filed.

Check similar plugins here.

GNU/Linux, Technology

Surf The Web From Keyboard Without Using Mouse

July 13, 2012 Sangkrit Leave a comment

DeadMouse, a Google Chrome extension lets you to follow webpage links directly from keyboard without using mouse.

If you want to check it live then click here

Features:

Follow any link by typing
Fuzzy-matching on link text
Press Enter to follow the link
Tab-cycle through multiple matches
Shift+Enter to open link in a new tab

Download:

Download
Get Source On GitHub

Note: If you don’t use this extension then also you can visit any web page by typing and pressing enter after you open Google Chrome or its new tab.

Use tab (keyboard key) for moving your selection to various links, enter for opening them and shift + enter for opening them in a new tab.

GNU/Linux

Google Maps Now Comes In 22 American Museums

July 13, 2012 Sangkrit Leave a comment

Google maps are becoming prevalent to Cultural places. There are 22 museums using Google Maps:

The de Young in San Francisco
The Philadelphia Museum of Art
Cincinnati Museum Center
The Indianapolis Museum of Art
The American Museum of Natural History
Smithsonian museums

And 17 largest museum complex all over the world, consisting of 19 buildings, one national Zoo, galleries and outside Washington it will be visible on Android machines. The number of extensions of maps on the mobile system of Big G touches it the target of 10 000. The art pieces are tens of millions.

GNU/Linux

Kubuntu Office Suites

July 12, 2012 Sangkrit 2 Comments

LibreOffice is GPL-licensed free and open source office suite , with Writer, Impress, Calc spreadsheet, Base relational database frontend
Install using sudo apt-get install libreoffice-kde

Open Office was installed by default in older versions of (K)Ubuntu. It has been replaced by LibreOffice (which is similar) and is no longer available in (K)Ubuntu.

KOffice suite is part of the KDE project and provides capabilities of OpenOffice suite without the licensing restrictions of OpenOffice. It can be used in any version of (K)Ubuntu. Install using: sudo apt-get install koffice

AbiWord is a fast, collaboration-enabled word processor. For the most current version see the AbiWord web site. For install from repositories: sudo apt-get install abiword

GoldenDict is multi-lingual dictionary and translator that supports Babylon and StarDict translation dictionary files and has multiple modular plugins. Install using: sudo apt-get install goldendict

Xournal is a free (GPL-licensed) GTK/Gnome-based application for notetaking, sketching, or keeping a journal using a stylus. Install using( Remember: universe repositories must be enabled): sudo apt-get install xournal

GNU/Linux, Technology

Introducing Mozilla Persona An Identity System For The Web

July 12, 2012 Sangkrit Leave a comment

Mozilla Introduced Mozilla Persona An Identity System For The Web with three newly updated features:

A Better Way To Sign In: Improved way of signing in to your websites. Instead of managing multiple usernames and passwords across your favorite sites and devices, you get more time to do the useful stuff.

You Own Your Data: Many sign-ins carry your profile data and some even share that info with other sites and social networks. Persona lets you get started with only your email address and you get the option to add profile data later on where you think it’s appropriate.

Ease for publishers: Enabling Browser ID, the underlying Persona technology, on your site only takes a few lines of code and helps build good relationships by providing users with a trusted sign-in option.

You may also try it yourself, visit here.

Also Check Personas Themes in Firefox here.

Social Media, Technology, Twitter

Get Twitter Service Updates Through Its Different Accounts

July 11, 2012 Sangkrit Leave a comment

@twitter: Always wondering what’s happening.

@twitterapi: The Real Twitter API. I tweet about API changes, service issues and happily answer questions about Twitter and our API. Don’t get an answer? It’s on my website.

@twittermobile: To get Mobile Updates

@spam: Suspect Twitter spam? Let us know (http://bit.ly/Tweport)! Follow @spam & @safety for helpful info, and check out our favorite tips: http://bit.ly/spamfav

@feedback: Collecting ideas and feature requests! We can’t reply to everyone but we do actively read your @mentions!

@support: Updates from Twitter User Support. We’re unable to assist with account suspension/verification.

@safety: Twitter’s Trust and Safety Updates! Twitter HQ · http://help.twitter.com/forums/10711/entries/76036

@fledgling:A Twitter wine project that promotes literacy around the world. San Francisco · http://www.fledglingwine.com

@hope140: Now @TwitterGood Highlighting forces of good in the Twitter community.

@twitterbusiness: Twitter for your business, community group, government organization or school

@twitterads: We tweet for brands. San Francisco, CA · http://advertising.twitter.com

@twittercomms: Talking to everyone, all at once! · http://blog.twitter.com/

@twitterSF: San Francisco born and bred. Looking to make a positive impact on our hometown.

@mobilesupport: Updates from Twitter Mobile Support. · http://support.twitter.com/groups/34-mobile

@twi: The official Twitter India account

@twitter_kr: 트위터 관련 다양한 소식을 전해드리는 공식 트위터 대한민국 계정입니다! 대한민국 · http://blog.kr.twitter.com/

@twitter_es: ¡Bienvenidos a la cuenta oficial de Twitter en español! ¿Eres nuevo? Empieza aquí https://twitter.com/#!/welcome San Francisco, CA · http://blog.es.twitter.com

@twitter_fr: Bienvenue au compte officiel de Twitter en France ! Pour plus d’infos rendez-vous sur http://blog.fr.twitter.com ! San Francisco CA · https://twitter.com/welcome

@twitter_de: Der offizielle deutsche Twitter Account!———http://blog.de.twitter.com Bei Support-Fragen findet ihr Antworten unter https://support.twitter.com/forms

@twitter_pt: Bem-Vindos à conta oficial do Twitter em português!http://blog.pt.twitter.com/

@twitter-ru: Приветствуем вас на официальной учётной записи Твиттера на русском языке! Сан-Франциско, Калифорния

@twitter-tr: Twitter Türkçe resmi hesabı http://blog.tr.twitter.com

@twitter_twj: 日本語版Twitter公式アカウントです。東京 · http://blog.jp.twitter.com

@twittermedia: Tracking cool, meaningful uses of Tweets in media, tv, sports, entertainment and journalism. Send us tips! San Francisco · http://media.twitter.com

@jointheflock: Twitter Recruiting: All the deets about who we’re hiring, what we’re doing and why you should come and work here! Check out www.twitter.com/jobs for more. San Francisco, CA · http://www.youtube.com/watch?v=vccZkELgEsU

@gov: Updates from the Twitter Government & Politics team, tracking creative & effective uses of Twitter for civic engagement. RTs & examples≠political endorsements.

GNU/Linux

Ubuntu Linux System Backup Tools

July 11, 2012 Sangkrit Leave a comment

Rsync

Rsync is the directory backup and transfer tool for Linux. Installed as default in Ubuntu. It can provide any type of backup, and options are extensive.

GRsync

GRsync is a GTK-based GUI for Rsync. Install this by following command:

sudo apt-get install grsync

Bacula

Bacula is the most widely-used GTK-based open source (GPL-licensed) network backup utility that is used in both server and desktop installations. A catalogue of backups can be maintained using MySQL, PostgreSQL, or SQLite. For more info see the Ubuntu documentation. Both text-based and GUI frontends are available. Install the MySQL version:

sudo apt-get install bacula

SBackup

SBackup is a common backup and restore utility for the GTK-desktop. Install using following command:

sudo apt-get install sbackup

PHP, Technology, WordPress

Creating WordPress Multisite Network

July 11, 2012 Sangkrit Leave a comment

Install WordPress
Add the following line just above /* That’s all, stop editing! Happy blogging. */
define(‘WP_ALLOW_MULTISITE’, true);
Last step enables the Network Setup item in your Tools menu.
Go to Dashboard => Tools => Network Setup.
Do as directed. It will ask you to choose from the following two network options:

Sub-domains — a sub-domain based network in which sub-sites use subdomains. Example: http://lamp.sangkrit.net

Sub-directories — a path-based network in which sub-sites use directory path. Example: https://sangkrit.net/lamp

If you choose sub-domain network option then you will need to generate wild card from your c-panel check this tutorial: Subdomain Network: Adding A Wild-Card DNS In DNS Server
Network details get filled in automatically but you are free to make changes:

Server Address: The domain of the URL to access your WordPress installation.

Network Title: The title of your multisite network.

Admin E-mail: Super admin’s email address for whole network.

Click the Install button.
Follow on screen instructions. It provides you with cold blocks to add on your site’s wp-config.php and .htaccess files and prompts you to create a directory:

Create a directory for media file uploads. Directory should be writable by webserver.

Add the specified lines to your wp-config.php file

Add the specified lines to your .htaccess file
If you do not have a .htaccess file, then create it in root directory.

Clear your browser’s cache and login to your site.
From your Dashboard at the top left corner you will see My Sites menu. Now you may visit your Network Administration from My Sites => Network Admin => Dashboard.

GNU/Linux, Technology

Setting Up Linux Media Server And Sharing Files Between Multiple Linux Machines

July 11, 2012 Sangkrit Leave a comment

You can connect your multiple machines for sharing multimedia files through a centralized web server. In this tutorial you will learn how to set up Firefly Media Server on Ubuntu Server.

What is Firefly Media Server?

Firefly Media Server (formerly mt-daapd) is an free and open-source media server or daemon for the Roku SoundBridge and iTunes. It serves media files using Roku Server Protocol (RSP) and Digital Audio Access Protocol (DAAP).

Features of Firefly Media Server

Support for running on Unix/POSIX platforms
Support for running on Microsoft Windows and Mac OS X
Support for running on the Apple Inc. iPhone and iPod touch
Support for MP3, AAC, Ogg, FLAC, and WMA
Support for Roku SoundBridge via RSP
Support for on-the-fly transcoding of Ogg, FLAC, ALAC, and WMA
On Windows platforms, on-the-fly transcoding of WMA Lossless, WMA Pro and WMA Voice.
Web-based configuration
Support for user-created smart playlists
Integration with iTunes library including reading playlists
Supports serving streaming radio stations

Installing Firefly Media Server

Since we are installing on a Ubuntu Server, the installation is simple:

Open Linux terminal
Run the command sudo apt-get install mt-daap
Enter the user password

Configuration

Open configuration file and look for this line:

mp3_dir = /home/media/music

In this line you need to change to reflect the directory from where you will serve your media.

Here I created a new sub-directory in /opt called music. Perform this action by this command:

sudo mkdir /opt/media

Now make that directory DAAP server readable by using this command:

sudo chmod ug+r -R /opt/media

Other than this there are many more options available in the configuration file like server name, password protection, port, extensions, codec types and many more. Few options are described below:

Servername: Name your DAAP server will broadcast. Default is Firefly RELEASE_NUMBER HOSTNAME.
Password Protection: Limit access of users to the DAAP server.
Port: You may use a port other than the default (3689).
Extensions: The file types to be served by DAAP server.
Valid Codectypes: Configurations for the format conversion.

Starting Daemon

Complete configuration file, go ahead and move your media files into the directory and start the server using this command:

sudo /etc/init.d/mt-daap start

With this running server you can fire up a DAAP enabled client, just like iTunes or Songbird. DAAP server installation is good for small internal network where you can share multimedia files. It requires a running Linux server.

PHP, WordPress

Migrating Multiple Blogs To WordPress Multisite

July 10, 2012 Sangkrit Leave a comment

Export content of your existing WordPress installations from Dashboard=> Tools=> Export
Install WordPress
Activate Multisite by adding define(‘WP_ALLOW_MULTISITE’, true); in your wp-config.php
Open Dashboard of your new WordPress installation.
Open Tool=> Network Setup from Dashboard and do as directed.
Create blog for each site you like to import.
Import each site’s content you exported from old installations from Dashboard=> Tools=> Import
Install all themes and plugins of your old site if you like and network activate them.
If your old installations have their own domain names then Map domains to your main site using MU Domain Mapping

PHP, Technology, WordPress

Embedding RSS Feed In Your WordPress Posts And Pages

July 10, 2012 Sangkrit Leave a comment

Open Your themes function.php and add the following code at the bottom:

include_once(ABSPATH.WPINC.’/rss.php’);

function readRss($atts) {
extract(shortcode_atts(array(
“feed” => ‘http://‘,
“num” => ‘1’,
), $atts));

return wp_rss($feed, $num);
}

add_shortcode(‘rss’, ‘readRss’);

Save function.php and whenever you need to embed RSS in any of your post or page write the following short code inside your post:

[ rss feed=”https://sangkrit.net/feed” num=”5″ ]

In the above give short code replace https://sangkrit.net/feed with your feed address and in num=5 replace 5 with the number of posts you like to show.

Note: Remember there is no space between [ and rss feed and num=”5″ and ] so after you copy the short code; check the space, remove it (if there is some space) and then publish it.

GNU/Linux

Network Monitoring With Etherape

July 10, 2012 Sangkrit Leave a comment

EtherApe is a graphical utility that allows you to see in real-time where connections are being made on your network, or between your network or computer and the Internet. If you are experiencing unexpected network activity on your computer or LAN and wish to see where the activity is occurring. Both “local” user and “root user” installations are created; in general you must use the root user installation to see all your network traffic.

sudo apt-get install etherape

Features:

Network traffic is displayed graphically. The more “talkative” a node is, the bigger its representation.
Node and link color shows the most used protocol.
User may select what level of the protocol stack to concentrate on.
You may either look at traffic within your network, end to end IP, or even port to port TCP.
Data can be captured “off the wire” from a live network connection, or read from a tcpdump capture file.
Live data can be read from ethernet, FDDI, PPP, SLIP and WLAN interfaces, plus several other incapsulated formats (e.g. Linux cooked, PPI).
The following frame and packet types are currently supported: ETH_II, 802.2, 803.3, IP, IPv6, ARP, X25L3, REVARP, ATALK, AARP, IPX, VINES, TRAIN, LOOP, VLAN, ICMP, IGMP, GGP, IPIP, TCP, EGP, PUP, UDP, IDP, TP, ROUTING, RSVP, GRE, ESP, AH, EON, VINES, EIGRP, OSPF, ENCAP, PIM, IPCOMP, VRRP; and most TCP and UDP services, like TELNET, FTP, HTTP, POP3, NNTP, NETBIOS, IRC, DOMAIN, SNMP, etc.
Data display can be refined using a network filter using pcap syntax.
Display averaging and node persistence times are fully configurable.
Name resolution is done using standard libc functions, thus supporting DNS, hosts file, etc.
Clicking on a node/link opens a detail dialog showing protocol breakdown and other traffic statistics.
Protocol summary dialog shows global traffic statistics by protocol.
Node summary dialog shows traffic statistics by node.
Node statistics export to XML file.
Scrollkeeper/rarian-compatible manual integrated with yelp.

WordPress

Tips For Successful WordPress Site Submission To Search Engine

July 8, 2012 Sangkrit Leave a comment

You can submit your site to search engines through many resources. You may do so manually. Whatever method you choose search engine welcomes the site if your content is good.
Search engine scans all content whenever a site is submitted. So be sure about content, it should be there in your site.
Your site should have at least 9 posts so that search engine can get something to examine and evaluate.
Never submit your site to same search engine more than once a month. Never let a search engine note your anxiousness.
Always be ready to copy-paste or write a brief description of your site in about 200 words.
Submit those categories that belong to search engine’s directory.
Keep a list of your website’s various “addresses/URLs” .
You can submit your site’s root directory, various categories and feeds to search engines. This expands your search coverage.
Keep a track of what you have submitted and when to avoid random re submission.

Android/Linux, WordPress

WordPress Blogging From Android, iOS, BlackBerry, Nokia, WebOS

July 8, 2012 Sangkrit Leave a comment

Making your website’s theme mobile compatible or installing any mobile theme for your WordPress site is good but you can also choose from different mobile apps available for WordPress blogging through smartphone.

WordPress for Android

You can use this for publishing new posts to your blog, responding to comments, getting notified and much more from you Android machine.

Website | Download

WordPress for iOS

iOS app lets you write posts, upload photos, edit pages, and manage comments on your blog from your iPhone, iPad, or iPod touch.

Website | Download

WordPress for BlackBerry

Post to your WordPress blog from your BlackBerry. Manage comments and media, upload videos and more with this BlackBerry native app.

Website | Download

WordPress for Nokia

Nokia app allows you to edit your existing blog content, add new posts and pages, manage comments, and more — directly from your S60 or Maemo-powered Nokia device.

Website | Download

WordPress for WebOS

WebOS represents a different way to blog. It uses Sliding Panels that makes managing existing content on your blog intuitive and powerful. You can use visual editor for posting content to your blog.

Website | Download

Social Media, Technology, Twitter

Twitter Introduced Search Autocomplete And Search Within People You Follow

July 7, 2012 Sangkrit Leave a comment

Twitter has introduced new search features.

Search Autocomplete And
Search Within People You Follow

In addition to recent updates to searching feature these two new features would be making twitter search more complete by putting you closer to what you are looking for.

Search Autocomplete displays a dropdown set of like keywords while you enter them in the search box. It is more useful if you are searching any topic with hash-tag.

Following list gives a brief introduction to new features. List was released by Twitter with its new search update:

Spelling corrections: If you misspell a term, we’ll automatically show results for your intended query.
Related suggestions: If you search for a topic for which people use multiple terms, we will provide relevant suggestions for terms where the majority of that conversation is happening on Twitter.
Results with real names and usernames: When you search for a name like ‘Jeremy Lin,’ you’ll see results mentioning that person’s real name and their Twitter account username.
Results from people you follow: In addition to seeing ‘All’ or ‘Top’ Tweets for your search, you can also now see Tweets about a given topic from only the people you follow when you select the ‘People you follow’ view. Viewing Tweets about a topic from just the people you follow is a great way to find useful information and join the conversation.

Here are some tweets showing how people reacted on this new feature:

Twitter Search Adds “Search Within People You Follow”, Autocomplete, Related Results tcrn.ch/Nd2FzW but testing shows poor performance

— Josh Constine (@JoshConstine) July 6, 2012

Twitter search update sounds nice, but unless I can search back on all my tweets since I joined Twitter, I’m not that excited. cc @dickc

— Lance Ulanoff (@LanceUlanoff) July 6, 2012

I’m sure autocomplete is really complicated… but, how about accurate Twitter search results more than a week?

— Robert Hernandez (@webjournalist) July 6, 2012

Features of related search suggestions, search autocomplete and spelling corrections are also available in Twitter for iPhone and Android.

Rsync

GRsync

Bacula

SBackup

What is Firefly Media Server?

Features of Firefly Media Server

Installing Firefly Media Server

Configuration

Starting Daemon

WordPress for Android

WordPress for iOS

WordPress for BlackBerry

WordPress for Nokia

WordPress for WebOS

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