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Ubuntu Nvidia XGL Beryl Twinview

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Ubuntu Nvidia XGL Beryl Twinview How To is a document which describes how you can have a Linux System running Ubuntu (or any other Linux distro) with both XGL eye-candy effects and twinview from Nvidia in order to see your movies in your flat  32'' cd TV.

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Configure Linux VLAN

Active ImageVLAN is an acronym for Virtual Local Area Network. Several VLANs can co-exist on a single physical switch, which are configured via software (Linux commands and configuration files) and not through hardware interface (you still need to configure switch).

Hubs or switch connects all nodes in a LAN and node can communicate without a router. For example, all nodes in LAN A can communicate with each other without the need for a router. If a node from LAN A wants to communicate with LAN B node, you need to use a router. Therefore, each LAN (A, B, C and so on) are separated using a router.

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Linux Bonding

Sample Image Bonding allows you to aggregate multiple ports into a single group, effectively combining the bandwidth into a single connection. Bonding also allows you to create multi-gigabit pipes to transport traffic through the highest traffic areas of your network. For example, you can aggregate three megabits ports into a three-megabits trunk port. That is equivalent with having one interface with three megabytes speed.
You can use it wherever you need redundant links, fault tolerance or load balancing networks. It is the best way to have a high availability network segment. A very useful way to use bonding is to use it in connection with 802.1q VLAN support (your network equipment must have 802.1q protocol implemented).

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Tomcat Cluster Session Replication

Sample ImageTomcat Cluster Session Replication how to is a document that describes how we can setup a tomcat 5.5 cluster with apache web server frontend using in-memory session replication.
Tomcat 5.5.x has significant performance improvements than tomcat 5.0, mostly because of java 5 (from performance metrics taken with jmeter –  about 50% faster in compilation of classes/jsp/servlets). In our example we will use 1 apache instance that load balance requests along 4 instances of tomcat servers in 2 different servers. 

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Solaris Patching with smpatch

 You probably want to get your Solaris systems up to date. I rather like the tool smpatch.
In order to use smpatch you first need to register the system.
 You can register a system with the following procedure ( ):

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Solaris 10 Init Scripts

 In Solaris 10, Sun decided to change a lot of things. One of them is the location of init scripts. Now /etc/rc?.d/script and /etc/init.d/script is no longer valid for most of the services.
Sun  changed all these "legacy" paths in order to perform faster boot process, as many init scripts can now initialized in parallel and introduces the Service Management Framework.
SMF (The Service Management Framework) is Solaris 10’s replacement for the aged sysV init.

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SNMP MRTG for Windows

 SNMP MRTG for Windows HowTo is a guideline to install and see some performance metrics from windows nodes through mrtg.
Internet is full of great guides for Linux/Routers/UNIX mrtg integrations
On the other hand, there aren’t many performance metric tools for windows. In this example we will see how we can see / create some CPU / processes running / network performance metrics in windows 2000/2003.

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Ubuntu dual monitor using nvidia and s3

ImageIn order to have a dual monitor in ubuntu, using nvidia (pci express in my case) and s3 (pci), you have to do the following. In my case, i also use features such as english-greek keyboard switch and 7-button mouse (back/forward keys for firefox). Working system is an ubuntu breezer for amd64.

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Debian Shoutcast Server

 This howto will describe how you can easily setup a shoutcast server with any linux distribution (in this example we used Debian, but it's almost the same with any distro). With shoutcast you can broadcast any song that winamp / xmms play (mp3, wav etc) and broadcast to server via nullsoft shoutcast DSP plugin for winamp / linux / mac…

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Linux Load Balancing Cluster

    Linux Load Balancing Cluster HowTo is a document that describes how you can  create a failover cluster of Linux machines that acts as a load balancing mechanism between the real network and groups of other machines (real servers).

    This setup will help someone to achieve high availability in many services plus the ability and flexibility to add / remove servers when needed.

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