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Search results for Xen Virtualization and Linux Clustering, Part 1


Virtualization With VirtualBox 3.1.x On A Headless Debian Lenny Server

Post date: February 23, 2010, 13:02 Category: Installing Views: 4012 Comments
Tutorial quote: This guide explains how you can run virtual machines with Sun xVM VirtualBox 3.1.x on a headless Debian Lenny server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.

Virtualization With VirtualBox 3.1.x On A Headless Mandriva 2010.0 Server

Post date: March 21, 2010, 12:03 Category: Installing Views: 6429 Comments
Tutorial quote: This guide explains how you can run virtual machines with Sun VirtualBox 3.1.x on a headless Mandriva 2010.0 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.

Install OpenWRT, Chillispot, FreeRadius Based Managed Hotspot(s) Including PayPal Payment Gateway

Post date: March 23, 2008, 14:03 Category: Miscellaneous Views: 6751 Comments
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.

Configuring virtual domains with Cyrus+Postfix in FreeBSD 5.4

Post date: December 1, 2005, 03:12 Category: Software Views: 5240 Comments
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.

Breaking the SHELL

Post date: May 29, 2005, 01:05 Category: Programming Views: 3825 Comments
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

Fbsplash on gentoo

Post date: April 12, 2005, 05:04 Category: Multimedia Views: 4285 Comments
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.

OpenOffice 2.0: Creating database forms

Post date: December 13, 2005, 12:12 Category: Software Views: 3510 Comments
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.

Custom Monitoring MySQL and SNMP with BixData

Post date: February 3, 2007, 00:02 Category: Software Views: 3829 Comments
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.

OpenSUSE 10.1 Installation Walkthrough with Screenshots

Post date: October 11, 2006, 16:10 Category: Installing Views: 9595 Comments
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).

Linux stateful firewall design

Post date: April 12, 2005, 17:04 Category: Network Views: 2953 Comments
Tutorial quote: This tutorial shows you how to use netfilter to set up a powerful Linux stateful firewall. All you need is an existing Linux system that's currently using a Linux 2.4.x or 2.6.x kernel. A laptop, workstation, router or server with at a Linux 2.4.x or 2.6.x kernel will do. You should be reasonably familiar with standard network terminology like IP addresses, source and destination port numbers, TCP, UDP and ICMP, etc. By the end of the tutorial, you'll understand how Linux stateful firewalls are put together and you'll have several example configurations to use in your own projects.
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