Tag Archive | Linux

Google launches Google Public DNS

Google has lauched a new service: a new public DNS resolver.

The Google Public DNS IP addresses are as follows:

This will make you web pages to load faster, which is a very good news for these days of highly structured HTML web pages full of multimedia contents and any kind of flash widget.

I”m testing it and it seems that it really brings some improvements and speed to the browsing.

In my humble opinion this is very useful for google wave that is still very heavy and slow..

Here is an extract of the google code blog post announcing this service

  • Speed: Resolver-side cache misses are one of the primary contributors to sluggish DNS responses. Clever caching techniques can help increase the speed of these responses. Google Public DNS implements prefetching: before the TTL on a record expires, we refresh the record continuously, asychronously and independently of user requests for a large number of popular domains. This allows Google Public DNS to serve many DNS requests in the round trip time it takes a packet to travel to our servers and back.
  • Security: DNS is vulnerable to spoofing attacks that can poison the cache of a nameserver and can route all its users to a malicious website. Until new protocols like DNSSEC get widely adopted, resolvers need to take additional measures to keep their caches secure. Google Public DNS makes it more difficult for attackers to spoof valid responses by randomizing the case of query names and including additional data in its DNS messages.
  • Validity: Google Public DNS complies with the DNS standards and gives the user the exact response his or her computer expects without performing any blocking, filtering, or redirection that may hamper a user’s browsing experience.

And here there’s a nice guide to setup your system in order to gain the advantages offered by this service.


Ubuntu One – Your Personal Cloud

Ubuntu One

I’m writing this post, to make you know about Ubuntu One, an interesting feature developed by Canonical Ltd (The private company that stays behind The Ubuntu Project). Ubuntu One was born during 2009, and at this moment is in Beta release. By the way, it is free for a standard use, or if you need more you can pay 10$ a month.

So that… You can use Ubuntu One to back up, store, sync and share your data with other Ubuntu One user.

To became an Ubuntu One user, you need to subscibe an account to Launchpad. When you have done this step, you can access to Ubuntu One, and choose your personal account, and it could be:

  • Free: 2 GB of private space on Canonical’s Servers.
  • Advanced: up to 50 GB of private space on Canonical’s Servers (at the cheap price of 10$ a month).

Now you are in… You can use it directly from your internet browser, or from the Ubuntu One Client Application (only for Ubuntu 9.04 or higher).

Ubuntu Client Application is already included into Ubuntu Karmic Koala 9.10, but you can install on your Ubuntu Jaunty Jackalope 9.04 following these steps:

  1. Update your system… go to System » Administration » Update Manager and click Install Updates.
  2. Add Ubuntu One PPA (Personal Package Archive) by clicking here.
  3. Install Client Install the Ubuntu One client from the PPA by clicking here (If you are not using a Firefox Browser, you can install the client by going to System » Administration » Synaptic Package Manager and searching for ubuntuone-client-gnome).
  4. Start Client Now that you have the software installed, you’ll need to authorize it. On your computer, click on Applications » Internet » Ubuntu One to start the process.
  5. Add Your Computer The final step is adding your computer to your Ubuntu One account. A web page will launch after clicking Ubuntu One in the previous step. Simply click on ‘Add this Computer’. Because this is your computer, it’s necessary for you to explicitly allow the software to access your Ubuntu One account.
  6. Start Using Ubuntu One You should now see a Ubuntu One icon in your panel. This is typically at the top of your Ubuntu desktop. Right clicking on that icon will give you a few different options including the ability to go to our web interface for managing files.. Congratulations! Now you can copy or upload files to get them into Ubuntu One.

With Ubuntu One, you can do a lot of things:

  • Share your files with friends, mates, co-workers and so on…
  • Update your notes, and read them from everywhere…
  • Update and read your Contacts, and access to them from everywhere…
  • Back Up your files, and get them from another Ubuntu PC…

What are you waiting for?!? Open your Ubuntu One Account now