The best articles of March 2011

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Apr 302011
 

collectd

This is the top 7 articles for the month of March 2011.

7 – Collectd, system performance statistics on Linux

In these days I have seen in a somewhat more detailed way collectd, an excellent tool for collecting statistics on various aspects of our Linux servers.

From Wikipedia: “collectd is a UNIX-daemon which collects, transfers and stores performance data of computers and network equipment. The acquired data is meant to help system administrators maintain an overview over available resources in order to detect existing or looming bottlenecks.

The first version of the daemon was written in 2005 by Florian Forster and has been further developed as free open-source project. Other developers have written improvements and extensions to the software that have been incorporated into the project. Most files of the source code are licensed under the terms of the GNU General Public License, version 2 (GPLv2), the remaining files are licensed under other open source licenses”
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How to recover from a failing Kernel

 Articles, Guides  2 Responses »
Apr 292011
 

sadOr perhaps i should call this “Do you remember i was upgrading to Ubuntu 11.04 ?”.

Well something is gone bad and when i rebooted to start my new Xubuntu 11.04 i got:

error: cannot read the Linux header.
error: you need to load the kernel first.

  Failed to boot both default and fallback entries.

Press any key to continue...

During the upgrade, Ubuntu has removed all old Kernel but one, and so..i find myself without a way to boot my machine.

Fortunately I did a lot of experience with Gentoo in the past, that on this occasion was very useful to recover the system.
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Release Day for many Linux distributions

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Apr 282011
 

natty Today it’s the day, Ubuntu 11.04 has been officially released and they server are now under “attack” by all the Ubuntu users that are trying to download the new release or update a former version, for me it took around 3 hours to finish the download of the 1400 packages needed to upgrade from Xubuntu 10.10 to 11.04 with two disconnection.

But Ubuntu is not the only thing released in these days; yesterday, has been released Slackware 13.37 ( codenamed leet ) and today it was also released version 2011.04 of Chakra Linux. Really a lot of news.
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Tesseract-ocr: convert scanned images into editable documents on Linux

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Apr 242011
 

gImageReaderTesseract-ocr: how to convert scanned documents into editable text on Ubuntu or Debian, Original article by Gabriele published on Gmstyle (italian blog)

I learned from the requests come via email, that some of my readers use Ubuntu (or Linux in general) to work and deal with graphics and publishing, who for his profession and who as a hobby. I draw inspiration from the request of a dear member of this little web space, which has given to me the input for this article, to make a bit of clarity about a subject that,for what I’ve saw around during my research on the Internet, seems to have created some difficulties for many people.

The argument i’m talking about is the OCR technology (Optical Character Recognition), that is a “technology ” that can recognize text characters from an image of paper documents previously digitized through the scanner and then transform this into an editable text. Continue reading »

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