Jul 102014
 

A content management system (CMS is a computer application that allows publishing, editing and modifying content, organizing, deleting as well as maintenance from a central interface. CMS’s are often used to run websites containing blogs, news, and shopping. Many corporate and marketing websites use CMS’s. CMS’s typically aim to avoid the need for hand coding, but may support it for specific elements or entire pages.

Some of the most famous open source CMS are Worpress (I use it to run linuxaria.com), Drupal and Joomla, they are (IMO) 3 old and solid CMS that can handle the majority of the needs, but there are much more open source CMS solutions and today I want to show you 4 less known solutions

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Jul 092014
 

Debian6lts
As probably most people know Debian has announced an extended support for Squeeze (AKA Debian 6), so while the “ordinary” support has ended on the 31 may 2014 there is now a Long Term Support (LTS) until the February 2016.
This has been announced by a team of volunteer on April

That’s a great news if you are not able to upgrade your server from Debian 6 to 7 and these are the instructions to do it easily.

Important: Squeeze-LTS will only support i386 and amd64. Users of other architectures are encouraged to upgrade to Debian 7 (“wheezy”).

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Jun 192014
 

rhel

Red Hat Enterprise Linux (RHEL) is a GNU/Linux distribution developed by Red Hat and targeted toward the commercial market.

Around 1 week ago the version 7 of Red Hat Enterprise has been released, and there seem to be great and interesting news in this version of the most used Gnu/Linux Enterprise distribution, let’s see some of them:

  • Linux Containers
  • XFS filesystems
  • Performance management
  • All the rest

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Jun 102014
 

slackarchArticle by Velimir Baksa

On many sites there are a lot of information about Ubuntu or its successor, Mint, these distributions are excellent, very good for those who have never seen anything on Linux, but maybe someone could be more interested in having a greater freedom of action and try something that goes beyond a well-marked path, so what do you think of the GNU/Linux Arch and Slackware distributions ?

Many things are spoken around Arch and Slackware. And also many myths are around surrounding these two distributions, for someone they are hard to install, hard to use, hard for administration, good only for geeks.

Many myths about Arch/Slackware and I should say also Gentoo aren’t true. Both, Arch and Slackware, bring only the best to the operating system experience. BSD elegance and Linux kernel. Great customization, great user experience and unique philosophy. Today quality and simplicity don’t go together. But let’s take a look at some of the main aspects of a GNU/linux Distribution.
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May 292014
 

Today I want to repost for my readers a really interesting article by Gionatan Danti first posted on his blog http://www.ilsistemista.net/, I hope you enjoy it as much as I do

File compression is an old trick: one of the first (if not the first) program capable of compressing files was “SQ”, in the early 1980s, but the first widespread, mass-know compressor probably was ZIP (released in 1989).

In other word, compressing a file to save space is nothing new and, while current TB-sized, low costs disks provide plenty of space, sometime compression is desirable because it not only reduces the space needed to store data, but it can even increase I/O performance due to the lower amount of bits to be written or read to/from the storage subsystem. This is especially true when comparing the ever-increasing CPU speed to the more-or-less stagnant mechanical disk performance (SSDs are another matter, of course).

While compression algorithms and programs varies, basically we can distinguish to main categories: generic lossless compressors and specialized, lossy compressors.

If the last categories include compressors with quite spectacular compression factor, they can typically be used only when you want to preserve the general information as a whole, and you are not interested in a true bit-wise precise representation of the original data. In other word, you can use a lossy compressor for storing an high-resolution photo or a song, but not for storing a compressed executable on your disk (executable need to be perfectly stored, bit per bit) or text log files (we don’t want to lose information on text files, right?).

So, for the general use case, lossless compressors are the way to go. But what compressor to use from the many available? Sometime different programs use the same underlying algorithm or even the same library implementation, so using one or another is a relatively low-important choice. However, when comparing compressors using different compression algorithms, the choice must be a weighted one: you want to privilege high compression ratio or speed? In other word, you need a fast and low-compression algorithm or a slow but more effective one?

In this article, we are going to examine many different compressors based on few different compressing libraries:

  • lz4, a new, high speed compression program and algorithm
  • lzop, based on the fast lzo library, implementing the LZO algorithm
  • gzip and pigz (multithreaded gzip), based on the zip library which implements the ZIP alg
  • bzip2 and pbzip2 (multithreaded bzip2), based on the libbzip2 library implementing the Burrows–Wheeler compressing scheme
  • 7-zip, based mainly (but not only) on the LZMA algorithm
  • xz, another LZMA-based program

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