Monthly Archives: October 2008

Securing your system from Internet threats using OpenDNS

Changing your Deault DNS provided by the ISP to OpenDNS makes the Web experience more secure and more customized. You can block several sites having viruses, spywares, pornography etc. in a simpler way. Also you can make shotcuts for adreesses that are easy to use with. For example, you only need to type mail to go to mail.yahoo.com if you set the shortcuts properly using OpenDNS. This service is free of cost, and its much faster.

To use OpenDNS you need to register an account at OpenDNS. If you’re using broadband internet such as BSNL, you need to setup the Primary and Secondary DNS to OpenDNS. To do this, follow

  1. Type/Click 192.168.1.1 in your browser to go to your DSL Router / Modem
  2. Enter Username and Password (May be both are admin)
  3. Select DNS and use custom instead of Default DNS. Enter the Primary and secondary DNS as 208.67.222.222 and 208.67.220.220
  4. Save and reboot the DSL Router.

You can change the settings at OpenDNS Dashbord. Use your security level and shortcuts.

You also need a client side program called ddclient for active communication with OpenDNS (To report your dynamic IP addresses to OpenDNS). It can be downloaded at http://ddclient.wiki.sourceforge.net/. Windows and Mac versions are available at OpenDNS site. For Ubuntu it is availabe via Synaptic.

sudo apt-get install ddclient

The configuration file for OpenDNS is like (in /etc/ddclient/ddclient.conf)

## OpenDNS

use=web, web=whatismyip.org
server=updates.opendns.com
protocol=dyndns2
login=
password=
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Filed under Configuration, News, OpenDNS

Internet use ‘good for the brain’

For middle-aged and older people at least, using the internet helps boost brain power, research suggests.

A University of California Los Angeles team found searching the web stimulated centres in the brain that controlled decision-making and complex reasoning.

The researchers say this might even help to counteract the age-related physiological changes that cause the brain to slow down.

The study features in the American Journal of Geriatric Psychiatry.

Brain activity in an experienced internet user when carrying out simple reading task

Areas activated by reading a book in the brain of an experienced web user

Brain activity in an experienced internet user when searching the web

Web use stimulates much more activity in the same brain

As the brain ages, a number of changes occur, including shrinkage and reductions in cell activity, which can affect performance.

It has long been thought that activities which keep the brain active, such as crossword puzzles, may help minimize that impact – and the latest study suggests that surfing the web can be added to the lis.

Lead researcher Professor Gary Small said: “The study results are encouraging, that emerging computerised technologies may have physiological effects and potential benefits for middle-aged and older adults.

“Internet searching engages complicated brain activity, which may help exercise and improve brain function.”

The latest study was based on 24 volunteers aged between 55 and 76. Half were experienced internet users, the rest were not

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Must have Firefox Extensions

  1. Adblock Plus
  2. Autofill forms
  3. Datafox
  4. Download Statusbar
  5. Fix-ml
  6. Flash Video Resources Downloader
  7. FlashGot
  8. NoScript
  9. ShowIP
  10. ShowMyIP

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Filed under Applications, Configuration, Linux, Tips, Ubuntu

Control your computer with your Bluetooth Phone

What is anyRemote?

anyRemote logo The overall goal of this project is to provide remote control service on Linux through Bluetooth, InfraRed, Wi-Fi or just TCP/IP connection.

anyRemote supports wide range of modern cell phones like Nokia, SonyEricsson, Motorola and others.

It was developed as thin communication layer between Bluetooth (or IR, Wi-Fi) capabled phone and Linux, and in principle could be configured to manage almost any software.

anyRemote is console application, but in addition there are GUI front ends for Gnome and KDE.

[DOWNLOAD ANYREMOTE] (anyRemote application)

[DOWNLOAD GANYREMOTE] (GUI frontend)

[DOWNLOAD JAVA CLIENT FOR PHONE]

The configuration files can be found in /usr/share/anyremote/cfg-data. Now you may be able to control applications like Totem/MPlayer/XMMS/Impress/Evince etc. with your phone running the Java client.

NOTE: A bluetooth USB dongle should be attached to the computer to use anyRemote.

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Filed under Applications, Linux, Ubuntu

Video Encoding made easy

There are several video/audio encoders available in Linux like Ffmpeg and Mencoder. But not everyone like the commandline version very much. But there are also GUI  front-ends for both these encoders. Avidemux and Vive are the GUI front-ends for Ffmpeg. And GMencoder is the GUI frontend for Mencoder. I built a deb package for these to install them on Ubuntu.

In order to use these tool you must install the Ffmpeg/Mencoder through Synaptic.

[Download Vive]

[Download GMencoder]

Also if you don’t want the GUI’s and stick with the commandline version. This page helps you to create custom commandline arguements for Mencoder.

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Filed under Applications, Linux, Multimedia, Ubuntu

Speed Up your Linux

  • Prelinking

1. Activate Ubuntu universe sources. This can be done in Synaptic, or by editing the /etc/apt/sources.list file.
2. Use apt-get or synaptic to install prelink.
3. Now run:

sudo gedit /etc/default/prelink

4. Near the top of the file find PRELINKING=unknown and change unknown to yes.
5. Now you should start your first prelink, don’t worry it will be faster the next time, MUCH faster. Only the changes since your last prelink will be processed. To start the first prelink, run:

sudo /etc/cron.daily/prelink
  • Disabling Unwanted Services

Look Here to find unwanted services

  • Avahi

You just have to edit /etc/defaults/avahi and set that =1 to =0. If all goes well, it won’t run next boot.

  • Concurrency

If you’re using a dualcore machine, use concurrency mechanism. Edit /etc/init.d/rc and change CONCURRENCY=None to CONCURRENCY=shell

  • Boot Profiling

(1) At the bootup menu (GRUB), select your default kernel. You may need to press ESC to see this menu.

(2) Press e for edit.

(3) Choose the first line (it should start with “kernel”). Press e again.

(4) Move to the end of the line, then add the word profile. Press enter.

(5) Press b to boot.

(6) Let the system boot to the login screen, and wait for all disk activity to stop. Remember, during this one bootup, you’ve told Ubuntu to keep track of all disk activity going on, in order to build that list. Don’t be surprised if it’s significantly slower than your ordinary bootups — that’s why it’s not activated by default, remember?

(7) Reboot your system, and enjoy the results.

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Filed under Configuration, Linux, Tips, Ubuntu

How to load Web site faster in Mozilla Firefox

  • Applications -> Internet -> Firefox Web Browser
  • Mozilla Firefox
  • Address Bar -> about:config

Filter: ->

network.dns.disableIPv6 -> true
network.http.pipelining -> true
network.http.pipelining.maxrequests -> 8
network.http.proxy.pipelining -> true

* Restart Mozilla Firefox

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Filed under Applications, Linux, Tips, Ubuntu, Uncategorized