Machine Learning - 1

WiFi hotspot from laptop to Nexus, Android or Windows Phone

As I have seen, our pc's make hotspot as an ad-hoc network which is not detected by most of our devices, especially our smart phones. So, in this tutorial I will show you some softwares and their tutorials which will help you to connect internet from your laptop or desktop to your smartphone (Windows, Android, Nexus).

• First, download and install Microsoft Virtual WiFi Adapter.(download), alternate link (download). The alternate link is from Marifi website(website), you can go to the website for more information.

Now, go to Control Panel>Network and Sharing Center>Change adapter settings(left side column - Windows 7), you will see Marify Connection. If you encounter any problem go to this link (http://www.maryfi.com/support.php#Setup_Maryfi).

• Second, download and install MyPublicWiFi software(download). Now, your system will act as a WiFi access point and can be detected by your smartphone. Tutorial can be seen in this link(tutorial). Note: After installation, every time you start MyPublicWiFi software on your laptop, run it as an administrator.(right click on MyPublicWiFi software>Run as administrator)

Above steps are tested on Nexus 4 and Windows 7 and I am sure that it will also work for other devices and OS(only Windows).

You can post your queries in comment.

ns2 software in Fedora

Download the software ns-2.35. Click here to download

Copy your downloaded file in /home/username.

Open terminal: become root(be careful now)

$su

Untar the file which you have downloaded by entering following commands:

$tar -xzvf ns-allinone-2.35.tar.gz
$cd ns-allinone-2.35
$./install

It will automatically compile, make and install.

After installation, PATH information will be shown on the screen.

Copy PATH, LD_LIBRARY_PATH, TCL_LIBRARY from the terminal to the .bash_proflie file.

Then run command:

$source .bash_profile

You will find .bash_profile in /root/.bash_profile
As you can see, it is a hidden file, so you can do ls -a to list hidden files.

The .bash_profile contents will look like

$cat .bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
~/.bashrc

fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin:/home/login-fedora/Downloads/ns-allinone-2.35/bin: ... 

 ... /home/login-fedora/Downloads/ns-allinone-2.35/tcl8.5.10/unix:/home/login-fedora/Downloads/ns-allinone-2.35/tk8.5.10/unix

export PATH
LD_LIBRARY_PATH=/home/login-fedora/Downloads/ns-allinone-2.35/otcl-1.14:/home/login-tesla/Downloads/ns-allinone-2.35/lib
TCL_LIBRARY=/home/login-fedora/Downloads/ns-allinone-2.35/tcl8.5.10/library

After you complete your installation process, to check whether you have installed correctly or not, run the following command and check for the following output:

CHECK 1:

$cd /home/ns-allinone-2.35/ns-2.35
$./ns

output: % (modulus sign)

CHECK 2:

$cd /home/ns-allinone-2.35/nam-1.15
$./nam

output: nam console window will open For any query comment below.

sudo in Fedora 17

Configuring sudo in fedora

Open terminal: Become a root user

  $su

Write this command in terminal:

  $echo 'your_username ALL=(ALL) ALL' /etc/sudoers

your_username= add your user name(the name by which you login)

Its done! Now, you can use sudo.

Installing Dropbox in Fedora

Open a terminal

  $sudo or su
  $cd /etc/yum.repos.d

After opening yum.repos.d directory, download the repo file. In terminal:

  $wget http://dl.dropbox.com/u/30876345/repo/dropbox.repo
  $yum update

Now, simply install dropbox

  $yum install nautilus-dropbox

Linux 2012 : One more Awesome year!

In 1991, Linus Torvalds began creating the first version of Linux. Linux is a contemporary, open source implementation of UNIX, available at no cost on the Internet.

The Linux Foundation - a non-profit consortium dedicated to fostering the growth of Linux

A video Posted by The Linux Foundation showing the records and achievements by Linux in 2012

Top Viruses since 1986

Now a days, computer viruses are fast treading into our day to day life in the form of trojans, back doors, worms, malwares, spy wares and many more. A peek into the history of these notorious creatures reveal that the first ever PC virus appeared in the year 1986. It was named 'Brain' and multiplied itself by writing its code to the boot sector of floppy disks. Since then, several species have come and gone. Kaspersky Lab has prepared a selection of the 15 most influential malicious programs in history. 
“For the last 15 years, we have been working round the clock every day analysing and combating all kinds of IT threats that have evolved in that time from cyber hooliganism, via cybercrime to cyber warfare. Today it’s more important than ever to cooperate against digital threats. Recent attacks such as Stuxnet, Duqu and Flame have shown just how vulnerable IT infrastructures are to military and terrorist threats. But we are doing all we can to prevent the potential disasters that could result from these kinds of attacks,” said Eugene Kaspersky, CEO and co-founder, Kaspersky Lab.


Here's the list of the top 15:

1986- Brain, the first PC virus appeared: the virus spread by writing its code to the boot sector of floppy disks.

1988- The Morris worm infected around 10 per cent of the computers connected to the Internet (about 6000 computers).

1992- Michelangelo, the first virus to attract massive media attention. 

1995- Concept, the first macro virus. 

1999- Melissa ushers in the era of mass-mailing of malware responsible for huge global epidemics. 

2003- Slammer, a fileless worm, responsible for a massive worldwide epidemic.

2004- Cabir: first Proof-of-Concept for Symbian; propagated via Bluetooth. 

2006- Leap, the first virus for Mac OSX. 

2007- Storm Worm (Zhelatin) pioneers the use of distributed C&C servers.

2008- Koobface, the first malware to target Facebook. 

2008- Conficker, one of the biggest epidemics in history, infects businesses, home users and governments in over 200 countries.

2010- FakePlayer, SMS Trojan for Android.

2010- Stuxnet, a targeted attack on SCADA (Supervisory Control and Data Acquisition) systems; signaled the advent of the cyberwar era. 

2011- Duqu, a sophisticated Trojan that collects intelligence about its targets. 

2012- Flame, a highly sophisticated, malicious program that is actively being used as a cyber weapon to target entities in several countries.

The article is cited from http://news.efytimes.com/e1/87462/Top--PC-Viruses-Since.