একশোবছর আগের ভবিষ্যদ্বাণী
নতুন বছর শুরু হওয়ার আগে কিছু জ্যোতিষী আগামী বছর কী হতে পারে তার ভবিষ্যদ্বাণী দেয়। গণমাধ্যমগুলো অতীত অভিজ্ঞতা বিশ্লেষণ করে সামনের বছর কী ঘটতে পারে তার একটা ধারণা দেয়ার চেষ্টা করে। কিন্তু আজ থেকে ১০০ বছর পর বিশ্বে কী ধরনের পরিবর্তন আসবে তার ভবিষ্যদ্বাণী করা সত্যিই কঠিন। ১৯০০ সালের ডিসেম্বর মাস। আমেরিকার এক অখ্যাত সিভিল ইঞ্জিনিয়ার জন এলফ্রেথ ওয়াটকিনস দেশটির লেডিস হোম জার্নালে আগামী একশ’ বছরে কী হতে পারে শিরোনামে একটি লেখা লিখেন। যেখানে তিনি ১৪টি ভবিষ্যদ্বাণী করেন। যার মধ্যে ১০টি বাস্তবে পরিণত হয়েছে।
২০০০ সালের বিশ্ব কেমন হবে তার ধারণা দিতে গিয়ে ওয়াটকিনস লেখেন, আমার ভবিষ্যদ্বাণীগুলো অনেকের কাছে অদ্ভুত ও অসম্ভব মনে হতে পারে। কিন্তু আমি দেশের প্রধান প্রধান বিজ্ঞানী ও গবেষণা সংস্থার গবেষকদের সঙ্গে কথা বলে এ সিদ্ধান্ত নিয়েছি।
ওয়াটকিনস ছিলেন লেডিস হোম জার্নালের অঙ্গ প্রতিষ্ঠান স্যাটারডে ইভিনিং পোস্টের নিয়মিত লেখক। এ দুই ম্যাগাজিনের ইতিহাস সম্পাদক জেফ নিলসন সপ্তাহ দুয়েক আগে ওয়াটকিনসের ভবিষ্যদ্বাণী সম্পর্কে বর্তমান যুগের পাঠককে জানান এবং নিখুঁত ভবিষ্যদ্বাণীর জন্য তার প্রশংসা করেন। অবশ্য অনেকে খুব অবাক হয়েছেন এটা ভেবে যে, কিভাবে ওয়াটকিনস এত নিখুঁত ভবিষ্যদ্বাণী করতে পারল। এবার দেখা যাক, তার আশ্চর্যজনক ১০ ভবিষ্যদ্বাণী যা ২০০০ সালের মধ্যে সত্যে পরিণত হয়েছে। Continue reading
Wikipedia to shut for 24 hours to stop anti-piracy act
Wikipedia, the popular community-edited online encyclopedia, will black out its English-language site for 24 hours to seek support against proposed US anti-piracy legislation that Wikipedia founder Jimmy Wales said threatens the future of the Internet.
The service will be the highest profile name to join a growing campaign starting at midnight Eastern Time on Wednesday that will see it black out its page so that visitors will only see information about the controversial Stop Online Piracy Act (SOPA) and the Protect Intellectual Property Act (PIPA).
The information will urge Wikipedia readers to contact their local congressman to vote against the bills. Other smaller sites leading the campaign include Reddit.com and Cheezeburger.
"This is a quite clumsily drafted legislation which is dangerous for an open Internet," said Wales in an interview.
The decision to black out the site was decided by voting within the Wikipedia community of writers and editors who manage the free service, Wales said. The English language Wikipedia receives more than 25 million average daily visitors from around the world, according to comScore data. Continue reading
OpenLDAP introduction
This document describes how to build, configure, and operate OpenLDAP Software to provide directory services. This includes details on how to configure and run the Standalone
1.1. What is a directory service?
A directory is a specialized database specifically designed for searching and browsing, in additional to supporting basic lookup and update functions.
Note: A directory is defined by some as merely a database optimized for read access. This definition, at best, is overly simplistic.
Directories tend to contain descriptive, attribute-based information and support sophisticated filtering capabilities. Directories generally do not support complicated transaction or roll-back schemes found in database management systems designed for handling high-volume complex updates. Directory updates are typically simple all-or-nothing changes, if they are allowed at all. Directories are generally tuned to give quick response to high-volume lookup or search operations. They may have the ability to replicate information widely in order to increase availability and reliability, while reducing response time. When directory information is replicated, temporary inconsistencies between the replicas may be okay, as long as inconsistencies are resolved in a timely manner.
There are many different ways to provide a directory service. Different methods allow different kinds of information to be stored in the directory, place different requirements on how that information can be referenced, queried and updated, how it is protected from unauthorized access, etc. Some directory services are local, providing service to a restricted context (e.g., the finger service on a single machine). Other services are global, providing service to a much broader context (e.g., the entire Internet). Global services are usually distributed, meaning that the data they contain is spread across many machines, all of which cooperate to provide the directory service. Typically a global service defines a uniform namespace which gives the same view of the data no matter where you are in relation to the data itself.
A web directory, such as provided by the Open Directory Project <http://dmoz.org>, is a good example of a directory service. These services catalog web pages and are specifically designed to support browsing and searching.
While some consider the Internet
Page Flip
PageFlip4 is a Flash application, written is Actionscript3, and needs Adobe Flash Player 10 installed as a plugin to run it in Your Browser. Adobe Flash CS5 is needed for source-file editing in case of embedding custom fonts, or controlbar icons.
Tested and Supported Browsers (with Javascript and CSS enabled):
Mac OS X: Safari, FireFox, Chrome (all the latest versions)
Windows XP & 7: Internet Explorer 6,8, FireFox, Chrome
PageFlip4 can be uploaded on any webserver.
Are you looking for a professional solution to manage the content of your book regularly without touching any source files? Update all pages of your book within minutes! PageFlip4 uses external images (or swf files) to fill its pages. Manage all the content and the features just by simply editing an XML file!
Some of the most important new features in PageFlip4: Real Spread, Multiflip, unlimited level of transparency, multiple Zoom level, Transitions (Fade, Zoom, Blur, or none), Background colour and images, Background Music, Info and Table of Contents floating windows, highly configurable HotSpots with popups, menu language selection,
PageFlip4 displays Right to Left written and/or vertical books also like the previous version.
Visit: pageflip.hu
How To Control Access To Unwanted Websites Using URL Blacklist With SafeSquid Proxy Server
SafeSquid – Content Filtering Internet Proxy, has many content filtering features that can be used to decide who is allowed what, when and how much on the net. In this tutorial I will describe how to control access to unwanted categories of websites, by using URL Blacklist database with SafeSquid Proxy Server.
Note: Also see the following articles :
'Deploying A Content Filtering Proxy Server To Distribute Controlled Internet Access With SafeSquid'
Set Up Gateway Level Virus Security With ClamAV And SafeSquid Proxy
How To Set Up Internet Access Control And Internet Filtering With SafeSquid Proxy Server
SafeSquid allows the administrators to use plain text urlblacklist very easily and with a desired level of sophistication. The sites http://www.shallalist.de/ and http://www.urlblacklist.com maintain a well categorized list of various web-sites and pages like porn, adult, webmail, jobsearch, entertainment, etc. This is an excellent resource for an administrator seeking to granularly enforce a corporate policy that allows or disallows only certain kinds of web-sites to be accessible by specific users, groups or networks.
Note: cProfiles offers the flexibility of many more actions than URL Blacklist, instead of just allowing / blocking categories. For example, you can add a profile to a specific category, and then use that profile in any of SafeSquid's filtering sections, for actions on the category like blocking cookies, ads and banners, ActiveX, Java Scripts, throttling bandwidth (QoS), or simply analyzing what category is most visited, without blocking access.
For Details, see http://www.safesquid.com/html/portal.php?page=132
While Shalla Secure Services offer free downloads and updates for home users, Urlblacklist requires you to subscribe to receive updates. You can download the URL Blacklist by Shalla from HERE, and the trial database by urlblacklist.com from HERE.
Please note that you will be able to download this trial database only once. You need to subscribe to urlblacklist.com to be able to receive regular updates
Copy the downloaded trial database to /usr/local/bin directory on the SafeSquid Server, and untar the files
cd /usr/local/src
tar -zxvf bigblacklist.tar.gz
This will create a directory 'blacklist'. Create a directory 'urlbl' in /opt/safesquid and copy the contents of blacklist in this directory.
mkdir /opt/safesquid/urlbl
cd blacklist
cp -rf . /opt/safesquid/urlbl
Next, restart SafeSquid
/etc/init.d/safesquid restart
In SafeSquid GUI Interface, click on URL blacklist in the Top Menu It should display a list of all the categories copied to the urlbl directory. Here, you can query the database to find out if a website is listed under any category. For example, to find out what category hackerstuff.com belongs to, type hackerstuff.com in the Domain field and click on Submit below. You should get a screen similar to this -
Note: This section only allows you to query the database. Selecting or unselecting a category does not enable or disable it. Continue reading
URL Filtering usng cProfile
cProfiles: Real-Time Website Profiler
cProfiles provides the SafeSquid users, the much needed mechanism of classifying web-sites, in one or more categories. Usage is very simple, yet will allow security managers a lot of room, to handle challenges rather inventively.
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How cProfiles works
URL Filter DB and URL Filter DB Guard
Together, URLfilterDB and ufdbGuard offer a unique set of features, all aimed at protecting your private network and reducing network bandwidth usage. These features include:
- URL filtering
- Advertisements blocking
- HTTPS proxy tunnel protection
- Blocking adult images produced by search engines
- Controlling HTTPS usage
- Content scanning: this method blocks access to web pages based on the occurrence of “bad” words in the content.
- Artificial intelligence: a variant on content scanning, intended to render more accurate results.
- Blacklists: this method blocks access to web pages based on their being listed in a website category to be blocked.
URLfilterDB uses the last method as the fastest and most accurate method for URL filtering available. Navigate to our product comparison page to find out why and how using a blacklist filtering method makes URLfilterDB superior to competitor’s products. Continue reading
Installing Unijoy keyboard on ubuntu
You must need internet connection to do that.
goto system>administration>synaptic packaga manager
goto settings>repositories and select the cd rom. Continue reading
Shoutcast Server on Windows
Pre-requisites:
1. Windows XP Professional installed
2. Connected to the internet via Highspeed internet connection
3. IIS Services installed
if not, here is how:
-Go to Control Panel > Add/Remove Programs > Add/Remove Windows Components.
-Go to the Internet Information Services and click Details, Now choose the World Wide Web Service (the required components will be checked automatically, i’d check the documentation option too!)
and Click OK and let XP install IIS.
4. Basic Networking Skills (know how to setup forward ports in router if needed)
To manage IIS / Webserver, Right Click My Computer > Manage
Go to the Bottom, and you’ll see the Internet Information Services, your webserver controls will be there.
Setup a basic homepage if you want, not required though. Continue reading
Netstat Command
Netstat command displays various network related information such as network connections, routing tables, interface statistics, masquerade connections, multicast memberships etc.,
In this article, let us review 10 practical unix netstat command examples.
1. List All Ports (both listening and non listening ports) Continue reading
