Category Archives: Technology News

How to install Ubuntu 12.04 on old computers with non PAE CPU

When I tried to install Ubuntu 12.04 on an old ThinkPad X40 I was surprised to discover this warning on my screen:

This kernel requires the following features not present on the CPU:
pae. Unable to boot - please use a kernel appropriate for your CPU.

In few words I wasn’t able to install Ubuntu 12.04 because the kernel on Ubuntu 12.04 was not supporting my CPU and I was really upset because I have always promoted Linux distributions as the most versatile and appropriate OS to keep using “old” hardware.

Sincerely, as described in an older post, I previously decided to install MATE desktop environment because the graphic cards on many laptops didn’t support Unity and Gnome 3 but this was the first time I had to renounce the installation of Ubuntu. I didn’t want to surrender to this difficulty (that appeared to me as a bug)!

First of all, I discovered that pae is “a feature to allow 32-bit x86 processors to access a physical address space (including random access memory and memory mapped devices) larger than 4 gigabytes“. After I clarified this point, I was not sure that my processor was totally inadequate to support Ubuntu 12.04.

After some web surfing I discovery that there are two easy solutions to avoid this problem.

1 – As first solution you can install Lubuntu (my choice) or Xubuntu on your computer then you can install the ubuntu-desktop using the Package Manager.

2 – If you prefer not to use the Package Manager you can install Ubuntu 11.04 or 11.10 and then upgrade Ubuntu to 12.04.

More in general, it is also possible to assume that if you have a non PAE CPU, your hardware could not be able to support the Unity desktop. For this reason you can keep your Lubuntu – Xubuntu (based on the light but effective LXDE desktop) or switch your desktop environment to Gnome (the Classic, of course) installing the gnome package instead of ubuntu-desktop.

In any case, if you want to know if your CPU supports pae you have to open a Terminal and type:

grep --color=always -i PAE /proc/cpuinfo

If something like “flags: fpu vme de pse tsc msr pae mce cx8…” outputs on your Terminal, you have a pae CPU otherwise your CPU doesn’t support pae.

The good third choice: MATE desktop environment. The traditional but rock solid solution for the Unity unhappy users (when also Gnome fails)…

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My first Linux OS was a Knoppix but I had so many problems with the hardware drivers, the LAN configuration and the monitor settings that I was really discouraged. After many tests I decided that Ubuntu was the right OS for my notebooks and I continued to use it without any particularly matters till Unity.

Unity is nice to see, intuitive but if you use your OS in a stressful way (I mean doing three or four different tasks all together: reading emails, talking with Skype and writing on LibreOffice), you spend too much time looking for the icon you need to launch the right program. The vertical monitor space has not enough room to visually show all the icons related to programs I use everyday. Surely this is my personal matter but I actually prefer the “old” graphic interface. For this reason I decided to install Gnome 3 but my vetust IBM Thinkpad crashed a couple of time in a week.

To my surprise also the Gnome Classic option encountered some crashes due to the amount and diversity of the software I installed on my laptop during the last years.

As usual, after some web searches I found a solution: MATE. This particular desktop environment is a fork of Gnome 2 and it really looks very intuitive and easy to use. If some software conflicts with the MATE environment, a pop-up message will appear on your sceeen and, if you have the patience to read the Details contained in it, you will able to solve your problems. In my particular case (don’t ask me why) it helped me to focus my attention on Conduit which caused the crashes on Gnome.

To easily install MATE, on almost every Linux distribution, you can read its wiki dedicated page or directly follow the below instruction if you use Ubuntu 12.04.

– open Terminal and type these command lines:

sudo add-apt-repository "deb http://repo.mate-desktop.org/ubuntu oneiric main"

sudo apt-get update

sudo apt-getinstall mate-archive-keyring

sudo apt-get update

sudo apt-get install mate-core

sudo apt-get install mate-desktop-environment

When the Terminal finishes all the upgrade stuff, reboot your Ubuntu 12.04 and select MATE on the login screen (click on the upper right “gear” and choose MATE).

That’s all! Have a good week!

The Internet a Decade Later – Infographics

“Unemployee of the year” a worldwide contest for young people by Unhate

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Usually I try to don’t promote commercial brands on my blog. Just sometimes I break this rule when I think the technology or the benefits could worth people attention. Today is one of that rare cases. Since few days, Unhate (a foundation directly related to Benetton) has created a special contest reserved to all people around the world. To participate you must be between 18 and 30 years old and you must not have a job yet. The best 100 projects will be funded with € 5.000,00 each. If you want to send your project or if you just want more information you have to visit the Unhate website.

Don’t let them to track your internet behaviour! Use Ghostery for Firefox

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We know that every time we visit a website we are caught by “invisible” robotized voyeurs which analyse our behaviour and share information to the site owner or to specialized data-collecting companies. These companies usually analyze the obtained information to improve the quality of their web service (in the most optimistic case) or to create a profile about the user with the specific goal to better sell services in the near future.

The real problem is that normally we are not able to realize what is happening. all this “ghost” activity happens in a silent mode without any tangible trace. To avoid this data collection and protect in a more efficient way our privacy we can use Ghostery, a specific add-on for Firefox and Chrome.

Ghostery defuses trackers, web bugs, pixels, and beacons placed on web pages by Facebook, Google Analytics, and more than 1,000 other ad networks, behavioral data providers, web publishers and companies interested in your web activity. As for every Firefox add-on, Ghostery is simple to install and manage. After the installation you can choose if you want to share anonymous information with the Ghostery servers to improve the quality of its services or if you prefer not to collaborate with them. You also can decide if you want to automatically update your Ghostery library and choose the specific trackers you want to neutralize. You can also create a policy for your cookies or (recommended) define a Whitelist for the websites you trust.

During my tests, Ghostery has not slowed the navigation speed in a sensible way also because I spent a little of time on creating a personalized Whitelist during my first use of this add-on.

Last but not least, Ghostery provides a very powerful information section where you can learn about any tracker it has blocked for you.

To conclude I can say that Ghostery is an add-on you must have on your Firefox to better protect your privacy!

Watch your privacy! Upgrade your Firefox security with HTTPS Everywhere and HTTPS Finder!

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As we already discussed many times in this blog, we know that web security is something very difficult to reach but we can always try to improve our security when surfing into the web.

First of all, use Firefox! Do it! In my opinion it’s slower than Chrome but very “transparent” and so you have less risks to unintentionally share information you want to keep private. In my experience, Firefox could be safer than Chrome if you use the right adds-on.

Then, install a particular add-on named HTTPS Everywhere.

This add-on (for Firefox and Chrome) will automatically connect your browser to the https version of many websites contained in its “Rule list”. The number of https connections in the HTTPS Everywhere’s list is sufficiently wide and you can always decide to manually add new https addresses (more info) as in the following example:

<ruleset name=”Google”>
<target host=”www.google.com” />
<target host=”google.com” />

<rule from=”^http://(www\.)?google\.com/” to=”https://google.com/”/>
</ruleset>

If you prefer to save time and you don’t want to write some lines for every website you prefer to connect through https, you will install another add-on: HTTPS Finder. HTTPS Finder is perfectly interconnected with HTTPS Everywhere and it will try to reach every website you type into the address bar, using a https connection. If it finds a valid https website, it will ask you if you want to add a specific rule into HTTPS Everywhere rule list. At this point you have only to agree and the new rule will be stored in the list.

Simple, easy, useful!

How to install and manage Screenlets on Ubuntu

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Screenlets are small applications to represent things such as sticky notes, clocks, calendars around on your Ubuntu desktop. You can launch a pre-installed screenlet from Screenlet Manager, or install a new one into the Manager for launching it. Here are the steps for installing and launching a screenlet, for example, WaterMark System Information.
– Install Screenlets Manager if it has not been added.
– Go to Applications (or Main Menu) > Ubuntu Software Center.
– Enter screenlets in the Search Box.
– Select Screenlets, click the “Install” button.
– Download the screenlet e.g. “WaterMark System Information” to a folder.
– Go to Applications (or Main Menu) > Accessories > Screenlets.
– Click Install, select Install Screenlet and click OK.
– Browse to the folder, select the file downloaded and click “Open” to install the screenlet into the Screenlets Manager.
– Select the screenlet “WaterMark” and click “Launch/Add”. (Tips: you can add more than one WaterMark screenlet and set it to display other system information.)
More screenlets are available for installation from screenlets.org.

Video – Linux Wifi Mac address spoofing by peruzfinest08

Video – Mozilla Collusion privacy tracking add-on for Firefox

Few Tricks to protect your web searches from Search Engines logging

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During the past weeks, we read many posts and articles about the new privacy rules that Google introduced for its web services. The goal of this specific post is not about discussing privacy agreements and the many interesting points of view about this kind of topics but we would like to focus your attention on a couple of “tricks” which can help you to increase the privacy level.

First of all, you can decide to use an alternative search engine which doesn’t log your activity and it is not possible to define your profile about your web activities.

Privatelee

Privatelee has been developed to offer better privacy to people who prefer not to have their web searches automatically analyzed by google.com.

This search engine can work on https mode and its search results are the mix between external search such as Google and Bing. You can also decide to use just one web engine or both. Comparing the results obtained we can affirm that Privatelee is really very effective and offers the same main features of Google and Bing.

Startpage

Startpage is based on Google and has many flexible features that can be selected using the “settings” page. This particular search engine deletes all the logs after 48 hours and you can anonymously visualize images and videos or define how to manage cookies. Moreover, Startpage allows you to save your settings without using cookies.

As for Privatelee, please be sure to type https and not a “simple” http when you insert Startpage address in the bar.

Secondly, if you use Firefox, you can use a specific add-on TrackMeNot. TrackMeNot is a simple but useful add-on you can install on Firefox to obfuscate user search data profiler on Google, Bing, Yahoo, Baidu and others. TrackMeNot automatically issues random queries on the main search engines using a list a generic list of words. In this way, search engines are not able to create a real profile about you as web user. Your real searches will be just few between the hundreds fictionally created by TrackMeNot. TrackMeNot is completely configurable: you can choose the query frequency or define the klog of your automatic queries. By default, TrackMeNot uses the words contained in the RSS of four primary websites: The New York Times, CNN, MSNBC and The Register.

Last but not least, if you are using your PC in any area with poor Internet connection, you can disable TrackMe Not with just a click. Easy and fast!