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Search results for Xen Virtualization and Linux Clustering, Part 1

Linux Benchmarking Filesystems Part II
Post date: January 6, 2006, 16:01 Category: Benchmarks Views: 2548 Comments: 0
Tutorial quote: After the last article was published, I have received more than a dozen requests for a second filesystem benchmark using the 2.6 kernel. Since that time, I have converted entirely to XFS for every Linux machine I use, so I may be a bit bias regarding the XFS filesystem. I tried to keep the hardware roughly the same. Instead of a Western Digital 250GB and Promise ATA/100 controller, I am now am using a Seagate 400GB and Maxtor ATA/133 Promise controller. The physical machine remains the same, there is an additional 664MB of swap and I am now running Debian Etch. In the previous article, I was running Slackware 9.1 with custom compiled filesystem utilities. I've added a small section in the beginning that shows the filesystem creation and mount time, I've also added a graph showing these new benchmarks. After the first round of benchmarks, I received a sleuth of e-mails asking for the raw numbers. The numbers are now included in tables at the end of this e-mail for both the last and current set of benchmarks.
OpenBSD Apache - Serving up the Web
Post date: April 11, 2006, 17:04 Category: Network Views: 2643 Comments: 0
Tutorial quote: The Apache Web Server is installed as part of the OpenBSD base system. This guide will help you configure the web server: (Apache 1.3.12 is released with OpenBSD 2.7 and 1.3.9 with OpenBSD 2.6)

To see how configurable the Apache/OpenBSD combination is we also look at allowing administrators to remotely review the server's status, we setup the system so we allow users on our system to have their own personal web-space. Of course, for the security counscious you probably want to turn some of these things off after you get things up and running.
Debian How To Install The Openbravo ERP On Debian Etch
Post date: April 1, 2008, 06:04 Category: Installing Views: 1271 Comments: 0
Tutorial quote: This document describes how to set up Openbravo ERP (enterprise management system) on Debian Etch. Taken from the Openbravo page: "Openbravo is an open source ERP solution designed specifically for the SME (small to midsize firm). Developed in a web based environment, it includes many robust functionalities which are considered part of the extended ERP: procurement and warehouse management, project and service management, production management, and financial management."
Linux Custom Monitoring MySQL and SNMP with BixData
Post date: February 2, 2007, 18:02 Category: Software Views: 1121 Comments: 0
Tutorial quote: With BixData you can monitor your servers as well as VMware and Xen. BixData includes pre-built plugins for things like CPU, Memory, Disk, etc. but any good monitoring tool needs to be customizable. BixData includes the basic ability to run scripts and record their exit values, similar to Nagios Plugins. BixData 2.7 adds support for importing data in more complex formats. This allows you to monitor almost anything. I'll go through the steps showing you how to monitor MySQL locally where an agent is installed and then the steps to monitor a device remotely through SNMP. The advantage of BixData is that any data available through a BixAgent works with the standard tools such as the situation room, scoreboards, notifications and the reporting system. All data are stored in standard SQL tables and are easily accessible.
Linux Install OpenWRT, Chillispot, FreeRadius Based Managed Hotspot(s) Including PayPal Payment Gateway
Post date: March 23, 2008, 09:03 Category: Miscellaneous Views: 1886 Comments: 0
Tutorial quote: If you have ever tried to implement one of the hotspot HowTos on this and other sites, it might have dawned on you that this is not an easy feat to accomplish. Amazingly most solutions also leave out the most important part – how to get paid by the punters using the hotspot. Some will offer prepaid solution or access tickets that need to be printed, but this will require staff being involved on the premises. And in particular, once you want to offer a professional service and not just a toy concept it gets tricky – and expensive. Just imagine all the servers you need to provide redundant and load balanced freeradius, mysql and web servers. It is generally not worth the effort and expense for just one hotspot – unless of course you are willing to accept outages, unhappy customers etc.
FreeBSD Configuring virtual domains with Cyrus+Postfix in FreeBSD 5.4
Post date: November 30, 2005, 21:11 Category: Software Views: 2160 Comments: 0
Tutorial quote: Cyrus IMAP is an efficient IMAP server capable of handling a large number of accounts. Its biggest drawback is getting it installed and configured. This tutorial is a step-by-step guide on how to use Cyrus with the Postfix mail transfer agent (MTA). I tested these instructions with FreeBSD 5.4.

Postfix is a replacement for sendmail, the stock MTA that comes in FreeBSD. It is easier to configure and manage than sendmail. If you depend on sendmail, you can still look at the article for the Cyrus part, but you'll need to look elsewhere for the MTA configuration.

Unless otherwise instructed, perform all operations in this tutorial as root. You will need to use the port system. If you are new to it, check Chapter 4 of the FreeBSD Handbook.
Linux Breaking the SHELL
Post date: May 28, 2005, 20:05 Category: Programming Views: 1114 Comments: 0
Tutorial quote: Shell scripts are a part and parcel of almost all software applications running on UNIX, and the use simply spans from a trivial script, managing automatic database backup to bunch of scripts collaboratively doing complex operation on regular expressions.

Though it's a mere design decision to partition modules between scripts and programming language, but I personally feel that they sometimes come very handy saving lot of time and lines of code, when compared to implementing the same functionality in the programming language in context.And in fact with some exceptions, complexity of a shell script can scale to that of codes in C language. Add to this the power of all those numerous UNIX commands, and just think through, what can be achieved by shell scripts.
Here I will discuss few topics mainly relevant to intermediate shell programmers
Gentoo Fbsplash on gentoo
Post date: April 12, 2005, 00:04 Category: Multimedia Views: 1360 Comments: 0
Tutorial quote: Gensplash is a project started by Spock whose aim is to create a set of tools which could enrich the Gentoo boot process by displaying messages, animations, progress bars, etc. An explanation of the various things named *splash (bootsplash, gensplash, fbsplash, and splashutils) and how they relate to each other, can be found at Spock's Gensplash site.

Fbsplash is part of the gensplash project. According to fbsplash's documentation, "the framebuffer splash is a kernel feature that allows displaying a background picture on selected consoles and switching the first console to the so-called silent mode, while booting/rebooting/shutting down the system." The fbsplash device is accessed through the /dev/fbsplash device node. For fbsplash to work, a frame buffer device is required.
Unix+clones OpenOffice 2.0: Creating database forms
Post date: December 13, 2005, 06:12 Category: Software Views: 917 Comments: 0
Tutorial quote: ather than having a shallow affair with OpenOffice 2.0, we can use it to get a little more intimate with the data. We can even badger it into forming relations. Why force your database tables into a marriage with OpenOffice? Because, as with human relations, life -- and data -- are pretty meaningless without tight connections.

This tip on creating forms is part of a series I'm writing on OpenOffice.org 2.0 Base. So far, I've discussed making a plain database from scratch, creating tables, entering data using the table editor and a simple form and creating a view of a table or tables.

Let's start off with a description of what table relations are anyway, then discuss how to create a data entry form like this one, which has data from two related tables.
SuSe OpenSUSE 10.1 Installation Walkthrough with Screenshots
Post date: October 11, 2006, 11:10 Category: Installing Views: 3516 Comments: 0
Tutorial quote: SUSE (formerly SuSE) is the leading distribution of Linux in Europe. SUSE Linux sets new standards for quality and ease of use, offering comprehensive packages of Linux-based applications. It is available in English, German, French, and Italian. The readers of Linux Journal voted SuSE Linux the Reader’s Choice for Best Distribution (1/99).