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Wednesday, July 20, 2011

VirtualBox 4.1 Released With GUI Option To Clone VMs, More

http://www.webupd8.org/2011/07/virtualbox-41-released-with-gui-option.html
 ~ Web Upd8: Ubuntu / Linux blog


VirtualBox 4.1


VirtualBox 4.1 hs been released today, bringing some new GUI features like support for cloning VMs and a new wizard for copying virtual disks. Other changes:
  • Experimental support for PCI passthrough for Linux hosts
  • Enhanced wizard for creating new virtual disks
  • Raised the memory limit for 64-bit hosts to 1TB
  • Windows guests: Experimental WDDM graphics driver, supporting Windows Aero and providing Direct3D support using a cleaner approach
  • New Networking Mode UDP Tunnel: allows to interconnect VMs running on different hosts easily and transparently
  • Experimental support for SATA hard disk hotplugging available with VBoxManage

For a complete changelog, check out this page.

A bit of info on the new features so you'll know where to find them:

  • to clone a VM, simply right click it in the main VirtualBox window and select "Clone"
  • to copy a virtual disk, select File > Virtual Media Manager, right click a .vdi and select "Copy"


Install VirtualBox 4.1 in Ubuntu / Debian via repository

1. Firstly, remove VirtualBox 4.0 (if it's installed):

 sudo apt-get remove virtualbox-4.0

2. Add the VirtualBox repository and install the latest VirtualBox 4.1:

 echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -sc) contrib" | sudo tee /etc/apt/sources.list.d/virtualbox.list 
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
sudo apt-get update
sudo apt-get install virtualbox-4.1


3. Optional: for USB 2.0 devices, VirtualBox RDP and PXE boot for Intel cards support, you'll also have to install an Extension pack which you can download from HERE.

To install VirtualBox extension pack, double clicking the extension should be enough but if that doesn't work, open VirtualBox, go to File > Preferences and on the Extensions tab, click the "add" button on the right and browse for the VirtualBox extension pack.

For other Linux distributions, Windows and Mac OSX, see the VirtualBox download page.

Saturday, July 16, 2011

What Can Companies Do to Stop a DDoS Attack?

http://www.readwriteweb.com/archives/what_can_companies_do_to_stop_a_ddos_attack.php?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+readwriteweb+%28ReadWriteWeb%29&utm_content=Google+Feedfetcher
By Dan Rowinski / July 4, 2011 7:01 AM / 4 Comments

The most well-known trick criminal hackers have in their bag is the distributed denial of service (DDoS) attack. To create a DDoS attack, hackers use a botnet to send mass amounts of traffic at a website server, bringing the site down. Recent attacks targeted CIA's public website, Wordpress and credit card companies. The "hacks" make big news and it seems like almost every other day another large commercial website is taken down.
The most important thing to known about a DDos attack is that it is really not a hack at all. The purpose of DDoS attacks are not to steal information but rather to prove a point. "We control massive botnets and can make life very difficult for you" is the message that hackers are sending. A DDoS is what many would call a "dumb" attack because it is sheer force, a giant hammer aimed at a Web server. Yet, large-scale dumb attacks are often the most difficult to stop. What can companies do to protect themselves against a DDoS attack on their doorstep?

Tuesday, July 12, 2011

BootMed Teaches You How to Save Ailing PCs

http://www.pcworld.com/article/235074/bootmed_teaches_you_how_to_save_ailing_pcs.html
 | PCWorld


BootMed is not a program, it's an Ubuntu-based boot disc tailored (or "remixed," in BootMed jargon) with the idea of recovering failed or malware-infected Windows PC installations. More than that, it's also aimed at helping less tech-savvy users through the process. The first thing BootMed (free/donationware) does after booting is open Firefox and browse to the BootMed site to display help and advice on recovery operations. It has versions for 32-bit and 64-bit PCs.
BootMed screenshotA stark representation of the Ubuntu desktop highlights the handy BootMed recovery tool collection.I'm sure the idea of using Linux to help teach Windows users how to recover their files has invoked a few chuckles amongst the Linux community as well as grimaces from Microsoft, though it's nothing radically new: I use Slax and Parted Magic all the time to recover data from Windows PCs. BootMed is not dead-simple--you must at least understand the concepts involved and be fairly proficient at navigating a file system--but it's a boon for less experienced users that want to learn the basic processes of recovery and of course, recover things.
I'm definitely adding BootMed to my bag of tools for no other reason than that it presents a small but very useful array of tools on an uncluttered desktop. Said tools include the GParted partition manager as well as WINE, which allows you to run Windows programs such as the included McAfee Stinger and ClamWin to remove viruses and other malware. Also on hand are the PhotoRec file recovery tool and the TestDiskpartition recovery and boot doctor.
One other nice BootMed touch is the Computer icon, which will be familiar to Windows users, and jumps right to the file system. It allows you to copy off files just as you would with Windows Explorer. For those who understand Linux commands, there's also a terminal icon (the equivalent of CMD in Windows).
It's a large download, but BootMed is worth it. It's a handy recovery as well as learning tool. BootMed is free, but author/maintainer Jake Teater accepts donations.

Wednesday, June 29, 2011

Four More Tips for Android Users

http://gadgetwise.blogs.nytimes.com/2011/06/27/four-more-tips-for-android-users/?ref=android
 - NYTimes.com

There are so many things you can do by tapping the screen of an Android phone  —  or by holding your fingertip down for two seconds in what Google calls a "long press"  —    that most owners haven't found them yet. I published a list of 12 tips for Android last week. Here are four more.

3D Maps — Get the latest release of Google Maps, a free download via Android Market. While looking at a map, you can tilt it by sliding two fingers vertically up or down the screen, and rotate it by placing two fingers on the map  — one at the top and one at the bottom, or one on each side  —   and making a circular motion.

Bigger browser font —  Do you find yourself constantly stretching Web pages with your fingertips to read them? Change the default font size instead. While looking at the Browser app, press the menu button on your phone. Tap the More option, then choose Settings at the very bottom (you may have to scroll down.) Change the first option, Text Size, from Normal to Large.

Stop the screen from turning off —  While your phone is plugged in, you can have it disable the battery-saving function that turns off the screen while you are reading, or using the phone as a bedside clock radio. Bring up the Settings app. Tap Applications, then Development. Turn on the "Stay awake" option. It was put there to help software developers. But we end users, in geek jargon, have plenty of uses for it.

Type contact names on the phone keypad — Unlike my other tips, this one works on an HTC Incredible but not on a Motorola Droid 2, so I suspect it's an HTC add-on. Still, it'll help a lot of HTC owners. Instead of finding address book contacts by bringing up your address book and then typing their names into the onscreen keyboard, bring up the phone's keypad dialer, which has much larger, easier-to-tap keys. Tap your contact's name on the keypad   —  e.g. 5-6-4 to spell J-O-H for John. The phone app will pop up a list of auto-complete options for the name from your address book. It's both faster and easier than going through the address book. Dear Google: Can you build this into all Android phones?

12 Tips for Using Your Android Phone

http://www.nytimes.com/2011/06/23/technology/personaltech/23basics.html?ref=android&pagewanted=print
 - NYTimes.com

Mobile phones that run Google's Android operating system come in various shapes, sizes and features, unlike Apple's iPhones. And Android phones are available on a variety of carriers, including Boost Mobile, where a data plan can cost as little as $35 a month.

But despite the variety of Android phones, and of carriers, there are a lot of useful features common to all. Here are some tips on finding them:

THE LONG PRESS The key to many of these tips is the long press: Instead of tapping a button, word or icon on the screen, press and hold your finger on it for two seconds. Often, this will bring up a menu of options specific to the type of item, like one to bookmark a Web link. You can also long press the hardware keys on the phone, and the background of the home screen, to reveal various options.

In general, long-press functions are intended to save you from tapping through a series of menus to perform a common task. It's the equivalent of right-clicking your mouse on a PC screen.

So, for example, you can long press the home key on your phone's case — the one that looks like a little house — to bring up a menu of your eight most recently used apps. This lets you hop quickly between, say, an e-mail you are composing and your Web browser.

You can also long press the search key — it looks like a magnifying glass — to pop up a microphone icon labeled "Speak Now." Android's Voice Commands system understands at least 10 commands, like "Send text to Alison Wright, running late will see you at 6," "Navigate to the nearest pizza place," "Listen to Taylor Swift," and of course, "Note to self." If you don't begin with a special command, Android will assume you are speaking a Web search.

Within the browser app, long press the back key — the one labeled with an arrow U-turning left — to snap open a screen with your bookmarks, most visited pages and browsing history displayed in tabs.

Long press on your home screen's background to bring up a menu of options that includes Shortcuts. You can create a shortcut, which looks just like an app on your home screen, that links directly to a bookmarked Web page, a person in your contact list or a navigation destination. Android will label the shortcut with the Web site's logo, the person's face or an icon you choose for destinations.

Too many icons on your home screen? Long press on the screen to pop up a menu that includes a Folders option. You can create a folder icon and call it, say, Games, into which you can drag all your game apps.

Long press a link on a Web page to pop up a menu that lets you open the link in a new window. To switch windows, press the menu key — the one that's a grid of four squares — and tap Windows in the options that appear onscreen.

And long press can also be used for accent marks. To insert, say, an e with an accent grave into a message, long press the "e" on your keyboard. That pops up a menu of "e" characters with various accent marks.

FAST ACCESS TO PHONE, TEXT AND E-MAIL In your address book, don't tap the person's name. Tap their photo. That pops up a menu of icons to call, text or e-mail. There are also options to send messages through Twitter and Facebook.

TAKE PHOTOS OF YOURSELF Android cameras without a second camera for self-portraits have a Self Portrait mode in the camera app. Tap it, and the camera will begin searching for faces in its viewfinder using facial-recognition software. The phone will shoot a new photo of you every few seconds, adding the pictures to your camera roll. It's more hit or miss than taking your photo in a mirror, but it's more fun, like mugging in an old-fashioned photo booth.

FASTER SENTENCES Android picked up a trick from old-school BlackBerry phones: When typing a text or e-mail message, you don't need to fumble for the period key at the end of a sentence. Just press the spacebar twice. Android will insert one period and one space much faster than you could type them yourself.

E-MAIL SHORTCUTS If you use Gmail on your Android phone, you can create separate shortcut icons, as described above, to specific accounts, folders and Gmail labels. This lets you have separate icons for work e-mail and personal e-mail, rather than opening whatever you last read when you tap the Gmail icon. Once you're in the e-mail app, you can also switch folders by tapping the name of the current folder at the top of the screen.

SILENCING A CALL Most users figure out they can get rid of a phone call by sliding the red arrow that appears onscreen when the phone is ringing. But not everyone realizes you can stop the phone from ringing by pressing the power button on top of the phone or either of the volume buttons on the right.

FIND ON PAGE To search for words within a Web page, press the menu key, tap More, and then tap "Find on page." A search box and keyboard will appear to let you type in search terms.

SHARE A PAGE ON FACEBOOK Another option on the browser's More menu is the Share page. One of the options to share is Facebook. Tapping it will open Facebook in the browser (rather than using Facebook's Android app) and set up the link to be shared, complete with a thumbnail image and a space to type your comments.

SEE TODAY'S DATE Android shows the time but not the date on your home screen. If you drag down the notification tray at the top of the screen, today's date appears in the upper left corner.

FOREIGN LANGUAGE KEYBOARDS Most domestic Android phones come with only English and Spanish keyboards installed for the touch screen. To add, say, a German keyboard, go to Android Market and search for "German keyboard." Expect to pay around $3 for most keyboard apps.

GET RID OF PESKY CALLERS Do you have a frequent caller whom you never want to answer? Add them to your address book if they're not already there. Then edit their entry, and scroll to the bottom for the option "Additional info." It's tricky to open the option; you have to tap the arrow key at the right, which will pop open more options, possibly out of sight below the bottom edge of your screen. But if you scroll all the way to the bottom of the extra options, you'll find a welcome surprise: "Send straight to voice mail?" Click once for peace of mind.


Monday, June 27, 2011

The Web is the biggest open source success of all

http://royal.pingdom.com/2011/01/10/the-web-is-the-biggest-open-source-success-of-all/

Open SourceThe open source movement is a popular one, and it's certainly made its mark on the software landscape. But where has it made its biggest mark? What is the most successful open source endeavor of all time?

Actually, when you see it as a whole, isn't the Web the biggest open source success of them all?

Perhaps the most famous example is the LAMP stack that lies behind so many websites, i.e. Linux, Apache, MySQL and PHP. But there's so much more when you think about it.

Here are some of the open source projects that make the Web tick.

Web browsers

While Microsoft's closed source Internet Explorer still has a big share of the web browser market, open source alternatives are just as common these days, and they are growing. We have Mozilla'sFirefox, which is open source, and then there's the rapid rise of Webkit-based browsers such as Safari, but most notably Chrome.

Add to this the mobile Web, where Webkit powers the browsers on iPhone, Android and Blackberry.

Web server software

The most-used web server software by far is Apache, which is open source, and a lightweight alternative called nginx has become quite popular in recent years. In fact, two out of the three top web servers are open source (the exception being Microsoft's IIS at a distant number two).

Then there's plenty of other server-side plumbing that is open source. For example, many high-traffic websites use Varnish as a caching layer towards website visitors, and Memcached as a caching layer against the website's database. And these are just two examples of many.

Scripting languages and web frameworks

Most of the programming and scripting languages used on the Web, like PHP, Perl, Python, Ruby, are open source projects.

But few sites start completely from scratch. There are literally hundreds of open source content management systems and web frameworks out there to help developers, for example WordPress,Drupal, Ruby on Rails, Django, Joomla! and more.

Databases

The open source software MySQL is by far the most popular database choice for websites. There are also other open source alternatives, for example PostgreSQL, not to mention a host of open source "NoSQL" options that are cropping up lately.

Oh, and while we're talking about plumbing, we must not forget one of the very basics we rely on every single time we use anything on the Web or the Internet:

DNS

The Web (and the whole Internet for that matter) would be pretty useless without the Domain Name System. You know, that thing that makes it possible for you to use names like example.com instead of IP addresses. BIND is pretty much the de facto standard software for DNS servers (a.k.a. name servers), and is, as you might guess by now, open source.

Server operating systems

All those websites have to run on servers, and open source dominates here as well. While Windows dominates on the desktop, the servers our websites run on mostly use Linux, which is open source. Other popular options are freeBSD and OpenBSD.

The open source appeal

It's not so strange that open source software has become so popular when in many cases it can provide quality alternatives to commercial, closed source software, but for free. Free is a hard price to beat.

The Web would most likely have had a much harder time becoming widely accepted without all this freely available software to run it all on.

Please note that we're not saying that there isn't any closed source on the Web. There obviously is. But the only real exception from the open source domination of the Web, statistically speaking, is Microsoft's stack of Windows-based alternatives.

Other than that, you usually need to go really deep to get into more proprietary closed source technology, like the operating systems on routers and such. But that's the Internet, not the Web.

Final words

Thanks to the rise of the Internet in the 80s, facilitating communication, collaboration and sharing, the open source movement blossomed. When the Web was born on top of the infrastructure of the Internet in the 90s, the open source movement was already in place to help.

No one can deny that open source powers the majority of the Web. Open source and the Web live in a symbiotic relationship, feeding off each other, nurturing each other.

That's why we think that the Web is arguably the greatest open source success to date. (Not to take anything away from Tim Berners-Lee.)

Friday, June 24, 2011

Obama drives Ned the robot at CMU lab

http://www.bizjournals.com/pittsburgh/blog/innovation/2011/06/obama-drives-RedZone-robot-at-cmu-lab.html?page=all

Date: Friday, June 24, 2011, 1:10pm EDT

When President Obama toured the National Robotics Engineering Center at Carnegie Mellon Universityon Friday, he did more than just watch and learn. He got to run a small, 15-inch robot named "Ned."

The robot, created by local company and CMU spinoff RedZone Robotics, is designed to inspect sewers and water pipes. But it reported for duty Friday morning for the commander-in-chief, who pool reports said took the controls behind an LED touch screen at the Lawrenceville center. Advising Obama were three RedZone executives, Sam Cancilla, Ken Wolf and Sub Vallapuzha.

"Let's see how Ned does," the president said, according to pool reports.

As Ned, which pool reports say looked a little like a torpedo, moved through a pipe, the president said he was fascinated.

"He's sending back data as he's going through," Obama asked.

Ned wasn't the only robot that Obama saw. He saw the DARPA, the Defense Advance Research Project Agency, car, a combat-support vehicle that was built by Chandler, Ariz.-based Local Motors. Local Motors "crowd-sourced" the design, seeking upward of 150 design ideas before settling upon one. It's being held up as a model of what can be done in advanced manufacturing in such a short time.

"That's really cool," Obama said, according to pool reports.

Executives from consumer-goods giant Procter & Gamble(NYSE: PG) were also on hand to show Obama how Los Alamos Labs software helped P&G retool its diaper manufacturing and save $500 million. The digital design tool could help small and midsized manufacturers.

The tour was led by Pradeep Khosla, dean of CMU's College of Engineering.

"Carnegie Mellon is a great example of what it means to move forward," Obama told an invite-only audience following the tour.

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