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How to correct “Partition does not start on physical sector boundary” on Linux

Jun 142013

I’m in the process of re-installing ArchLinux on my new Dell Latitude 6530, this is because at the end of the first installation I noticed that while running fdisk -l I received a message like this one (that’s not my original disk, but the message was the same):

Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63    39070079    19535008+  83  Linux
<strong>Partition 1 does not start on physical sector boundary.
</strong>/dev/sda2        39070080    46877669     3903795   82  Linux swap / Solaris
/dev/sda3   *    46877670   144536804    48829567+  86  NTFS volume set
<strong>Partition 3 does not start on physical sector boundary.
</strong>/dev/sda4       144536805  1250263727   552863461+  86  NTFS volume set
<strong>Partition 4 does not start on physical sector boundary.</strong>

I “shrinked” the original Windows 7 to 40 GB with Gparted live and created the partitions during the installation of ArchLinux with cfdisk so what’s wrong with these operations ?

Libre Office Version 4 – Tantalizingly Close

Articles, Opinion, Reviews 12 Responses »

Jun 132013

Article from Tcat Houser editor-in-chief of TRCBNews.com that recently ignited some fire with 2 articles:
OpenOffice versus LibreOffice versus The World and The Biggest Failure in Open Source Is…
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Some of the Linux faithful will look at this and say: “There he goes again, bashing open-source. He’s just a Microsoft shill.” They will use the fact I am an MCSE as ‘proof’ of their opinion.

Version 4.0 of LOO still suffers from the issue of cross file compatibility to Microsoft Office. However, the good news is the pain is less than ever before and we now get the ability to open Visio and Publisher files! Personally, I have not used either of these Microsoft programs in years so I cannot attest to how well they are handled.

Beyond my own daily use of LOO I have read in depth every review I could find on the Internet. My honest summary is they are far more negative than my feelings. Yes I must agree with everyone else that the most lacking area is complex documents not playing nice with MS Office. The second most cited shortcoming is the relatively confusing menus. I cannot really disagree there either. And there is always two sides to the coin. LOO’s brightside is shinier than ever. Less noticed is how much this version has pulled away to lead over Apache Open Office (AOO) formally known as Open Office Organization (OOO).
More about that later.
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Out test with Linux Mint 15 Olivia, Cinnamon edition

Articles, Opinion, Reviews 1 Response »

Jun 102013

I’ve changed the GNU/Linux distribution of my home computer from Xubuntu to Mint (XFCE edition) 2 releases ago, and from that date I’ve never regret it, so while I wait for the release of the XFCE edition of Olivia (the code name of Mint 15), I’m glad to publish an interesting article of Manuel and it’s experiences with the Cinnamon edition of Mint 15.
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The new version of Linux Mint has just been released. The developers have arrived at version 15, the nick name of this version is Olivia. A lot of the changes are specified in the release notes. Among the most striking a new managment for the proprietary drivers and the repository. The writer already used successfully Mint, but in the variant with the XFCE desktop environment. This time, it was decided to give credit to the developers of Mint and use the official version with Cinnamon instead of XFCE.

No more pleasantries. The new Mint soon proved to be a bomb, with really gew things to complain about. Installed as usual directly from an USB stick, in around twenty minutes we had everything set and ready. All the hardware of our laptop Dell Inspiron 1525 has been recognized on the fly, but we had to turn on the of the proprietary wireless driver in order to use the wireless connection. A few automatic updates remained to be done, and so, we started with our tests.
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BitMessage: Encrypted messaging, BitCoin-style

News, Reviews No Responses »

May 302013

Today I propose you an interesting topic based on an article by Jacob Cook first published on https://citizenweb.is/

Over the past few years, a handful of different encrypted messaging systems have cropped up and gained prominence, notably Cryptocat and the OTR specification. Now a newcomer to the scene proposes a different way of thinking about encrypted communication, one that borrows from its more well-known older brother, BitCoin.

A project has been started that intends to recreate BitCoin’s decentralized P2P model for seamless message encryption and transmission.
BitMessage was started by Jonathan Warr en late last year and has now made it up to version 0.2.4. One of the most prominent strengths of the BitMessage system is how it enforces anonymity. Similar to how BitCoin allows one to send money to anonymous recipients without advertising metadata to others, BitMessage communicates via simple addresses generated from public keys, which need not be tied to a specific user’s identity.

Using OpenDKIM to Sign Postfix Mails on Debian

Guides 13 Responses »

May 142013

Article By Chris Pentago

Goal of this how-to: Step to step guide on how to setup OpenDKIM with postfix on Debian GNU/Linux to send signed email from your VPS.

There are numerous methods or techniques that you can use to achieve email message signing. Good examples are DomainKey as well as DKIM which is an abbreviation for DomainKeys Identified Mail.

DomainKeys Identified Mail (DKIM) lets an organization take responsibility for a message that is in transit. The organization is a handler of the message, either as its originator or as an intermediary. Their reputation is the basis for evaluating whether to trust the message for further handling, such as delivery. Technically DKIM provides a method for validating a domain name identity that is associated with a message through cryptographic authentication.

These two techniques will not use symmetric encryption but rather will employ asymmetric encryption. (more info: http://support.microsoft.com/kb/246071) In both methods, the common algorithm used is RSA. This algorithm is also the default for these methods of achieving email message signing.

For those wondering about what asymmetric means, the following is a detailed explanation. It is a technique that utilizes a key to sign the email message. Other methods will not require a key. One can have two types of keys: a private key and a public key. These keys will come into play to verify the message as well. The two methods of creating email message signing as highlighted above are filters for SMTP server. DomainKey works with a dk-filter although this filter has been discontinued in the market. OpenDKIM has become the preferred replacement where filters are concerned.

A mail server must be enabled with a filter to set up the server properly. In light of this, Postfix can be used because it is enabled accordingly. Another requirement is the freedom to add or change the DNS records as you desire. With the above in mind, the following is a step by step guide on how to set up Postfix email server with DomainKey Indentified Mail on Debian.

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