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Salah, K; Kahtani, A. (2009). Improving Snort performance under Linux. IET Communications, Vol. 3 Issue 12, p1883-1895, 13p, 5 diagrams, 4 graphs Network intrusion detection systems (NIDS) have become vital components in securing today's computer networks. To be highly effective, NIDS must perform packet inspection of incoming traffic at or near wire speed. Failing to do so will allow malicious packets to sneak through the network undetected, and thus jeopardising network security. Snort is one of the most popular IDS and intrusion prevention system (IPS) applications. Snort is a publicly available open-source NIDS application that typically runs on Linux. In this study, the authors present and discuss the essential software components of Snort and its underlying Linux support architecture. The authors characterise Snort execution and present an analytical queuing model to give insight into understanding the kernel and Snort behaviour as well as to identify key-dominating factors that strongly influence and impact Snort performance. The authors demonstrate that the current default configurations of the packet reception mechanism of the Linux networking subsystem (a.k.a. NAPI) are not suitable for Snort performance and show that the performance of Snort can be improved significantly by tuning certain configuration parameters, specifically by having a small NAPI budge value of 2. The performance is measured in terms of throughput and packet loss. The authors also measure the packet loss encountered at the kernel level as well as the interrupt rate of incoming traffic. Performance was measured when subjecting a PC host running Snort to both normal and malicious traffic, and with different traffic load conditions. [ABSTRACT FROM AUTHOR] Babcock, Ch; (2009). Red Hat's Price War For Virtual Machines. InformationWeek, Issue 1247, p18-18.[Versi贸n electr贸nica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite. The article discusses the strategic plan of Red Hat Inc. as it enters the virtualization management field. It states that the company has added support for KVM hypervisor in its Red Hat Enterprise Linux 5.4 which makes it an essential piece of Red Hat's virtualization portfolio. Red Hat is late in the market in part because it started out supporting Xen hypervisor but shifted toward KVM when it was added to the Linux kernel. Biersdorfer, J. D. (2009/29/10). How to Defrag a Linux System. New York Times. p10.[Versi贸n electr贸nica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite. Q.I recently bought a netbook with Ubuntu as its operating system and would like to know if there is any simple way to defragment the drive. The help manual for the system talks only about a complete start-over with reinstalling the OS, rather than defragmenting it. A. Ubuntu Linux uses a different file system, or method of storing and organizing data, than other operating systems do. Most Ubuntu systems use the ext3 file system, which does not need regular defragmentation like a Windows system does. [ABSTRACT FROM PUBLISHER]


Thomas, K.(2009). How to Run Your Windows Applications in Linux. PC World, Vol. 27 Issue 10, p101 .[Versión electrónica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite. The article offers step-by-step instructions for running Windows applications in Linux. Spring,T.(2009). Google's Chrome OS: Game-Changing Failure?.PC World, Vol. 27 Issue 9, p12-14, 13p. .[Versión electrónica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite. The article focuses on the development of the Google Chrome operating system (OS) and the company's plans for it in the future. It mentions that the OS is specifically designed for notebooks, has the ability to boot in seconds, is impenetrable by viruses, and is designed to run Web-based applications very well. It mentions the plan of Google to introduce new software like Google Docs following the success of the OS. Also noted are the challenges faced by the OS, including competition with the Linux OS and possible privacy issues.

TEJAS Networks.(2009). Linux works for test. Test & Measurement World, Vol. 29 Issue 8, p11-11 .[Versión electrónica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite. An interview with the assistant manager of test engineering Anshul Jain at the networking products company Tejas Network is presented. When asked on what tests do their Linux-based test systems perform, he said that they run three parametric tests and examine with traffic and measure parameters. He mentions that they chose the Linux operating system due to its hardware costs, software costs and support. He stated that the company has added test-deployment platforms on their LabView operations.

Kinnander,O. (2009/28/08). Nokia to Roll Out Phone Based on Linux Software. Wall Street Journal - Eastern Edition. pB4.[Versión electrónica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite. The article reports on the launch by Finland-based Nokia Corp. of smart phones based on Linux-based software. It relates the importance of the high-end phone category to the company. It presents remarks of executive vice president Anssi Vanjoki on the move. It cites that Nokia's main competition with the iPhone are smart phones that use the Symbian operating system. The formation of an alliance by Nokia with Microsoft is also noted.


Castellano,M;Mastronardi,G;Bellotti,R;Tarricone,G..(2009). A bioinformatics knowledge discovery in text application for grid computing.BMCBioinformatics, Vol. 10,Special section, p1-10, 13p. .[Versi贸n electr贸nica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite.

Background: A fundamental activity in biomedical research is Knowledge Discovery which has the ability to search through large amounts of biomedical information such as documents and data. High performance computational infrastructures, such as Grid technologies, are emerging as a possible infrastructure to tackle the intensive use of Information and Communication resources in life science. The goal of this work was to develop a software middleware solution in order to exploit the many knowledge discovery applications on scalable and distributed computing systems to achieve intensive use of ICT resources. Methods: The development of a grid application for Knowledge Discovery in Text using a middleware solution based methodology is presented. The system must be able to: perform a user application model, process the jobs with the aim of creating many parallel jobs to distribute on the computational nodes. Finally, the system must be aware of the computational resources available, their status and must be able to monitor the execution of parallel jobs. These operative requirements lead to design a middleware to be specialized using user application modules. It included a graphical user interface in order to access to a node search system, a load balancing system and a transfer optimizer to reduce communication costs. Results: A middleware solution prototype and the performance evaluation of it in terms of the speed-up factor is shown. It was written in JAVA on Globus Toolkit 4 to build the grid infrastructure based on GNU/ Linux computer grid nodes. A test was carried out and the results are shown for the named entity recognition search of symptoms and pathologies. The search was applied to a collection of 5,000 scientific documents taken from PubMed. Conclusion: In this paper we discuss the development of a grid application based on a middleware solution. It has been tested on a knowledge discovery in text process to extract new and useful information about symptoms and pathologies from a large collection of unstructured scientific documents. As an example a computation of Knowledge Discovery in Database was applied on the output produced by the KDT user module to extract new knowledge about symptom and pathology bio-entities. [ABSTRACT FROM AUTHOR] Yalta,A; Lucchetti,R. (2008). The GNU/Linux platform and freedom respecting software for economists. Journal of Applied Econometrics.Vol. 23,Issue 2, p279-286 .[Versi贸n electr贸nica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite. The GNU/Linux operating system is rapidly gaining ground as an attractive alternative to the proprietary platforms particularly in academic institutions and


government agencies. Here, we supply an assessment of this resource from the perspective of econometricians, discuss its benefits and disadvantages along with a basic overview of some of the popular free/libre and open source programs hosted by this platform for conducting research in economics. [ABSTRACT FROM AUTHOR] Noriega,S.(2006). Sistemas de Almacenamiento y Respaldo sobreGNU/LINUX. Servicios Electrónicos Para la Sociedad de la Información. Desarrollo de Grandes Aplicaciones Distribuidas Sobre Internet, p227-240.[Versión electrónica] Recuperado el 04 de diciembre de 2009, de Base de datos Academic Search Elite.

Este texto pretende explicar las características entre los distintos tipos de sistemas de almacenamiento masivo (NAS , SAN, DAS), sus ventajas e inconvenientes y que diferencias hay a la hora de gestionarlos según sean libres o propietarios. Profundiza en las funcionalidades de Bacula, un software de respaldo de datos desarrollado con licencia GPL, capaz de realizar copias de seguridad en sistemas heterogéneos (GNU/linux, Unix, Macintosh, Novell y Windows).


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