virtualizer
VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software. VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high [...]
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VNC is used to display an X windows session running on another computer. Unlike a remote X connection, the xserver is running on the remote computer, not on your local workstation. Your workstation ( Linux or Windows ) is only displaying a copy of the display ( real or virtual ) that is running on [...]
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Access to the news server can be open to everyone, or it can require user authentication. The NNTP service allows fine tuning of security policies and is capable of handling a large number of virtual domains and independent server instances on a single computer. The NNTP service is not installed by default. You must install [...]
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Virtual Hosting allow web servers to host more than one website on a sing machine. This is how sharing hosting works. I become pretty handy as well while develloping different web project on the same machine and allows you to access to your local repository using addresses such as http://dev.mysite.com instead of http://localhost/~myuser/myproject/ :) . [...]
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This tutorial walks you through implementing disk quotas for both users and groups on Linux, using a virtual filesystem, which is a filesystem created from a disk file. Since quotas work on a per-filesystem basis, this is a way to implement quotas on a sub-section, or even multiple subsections of your drive, without reformatting. This [...]
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Some hardware manufacturers offer fault tolerance with their network adapters and accompanying drivers. Fault tolerance technology lets you group network adapter ports for a connection to a single physical segment. If connectivity through one port does not work, another port is opened automatically. This operation is transparent to the operating system and other devices on [...]
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Webalizer is a fast, free web server log file analysis program. It produces highly detailed, easily configurable usage reports in HTML format, for viewing with a standard web browser. It was written to solve several problems with currently available analysis packages. A vast majority of them were written in Perl or some other scripting language, [...]
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OpenVZ is an operating system-level virtualization technology based on the Linux kernel and operating system. OpenVZ allows a physical server to run multiple isolated operating system instances, known as containers, Virtual Private Servers (VPSs), or Virtual Environments (VEs). It’s similar to FreeBSD Jails and Solaris Zones. vzdump is a backup and restore utility for OpenVZ [...]
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The Virtual Private Network – VPN – has attracted the attention of many organizations looking to both expand their networking capabilities and reduce their costs. The VPN can be found in workplaces and homes, where they allow employees to safely log into company networks. Telecommuters and those who travel often find a VPN a more [...]
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As a system administrator, part of your daily duties is to monitor systems for performance and to tune systems where necessary. While there are expensive software products and benchmarking tools that can hone a machine to optimum efficiency, there exist several basic tools within Linux® that permit the knowledgeable system administrator to gather information and [...]
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Subversion depends on a number of third party tools and libraries.Some of them are only required to run a Subversion server; others are necessary just for a Subversion client. This section explains what other tools and libraries will be required so that Subversion can be built with the set of features you want
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Setting up virtual hosts is fairly straightforward. I will go through the basics of setting up a secure virtual host. In these examples, I use the .crt and .key file extensions. That is my personal way of avoiding confusion with the various files. With Apache, you can use any extension you choose – or no extension at all. All [...]
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The network-to-network setup allows you to connect two office networks into one Virtual Private Network, while the Road Warrior connection secures a laptop’s telecommute to work. Our examples also show the basic procedure on the Linux Openswan side where another IPsec peer is in play.Shortcut to net-to-net.Shortcut to Road Warrior.
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Apache also has the ability to dynamically compress static Web pages into gzip format and then send the result to the remote Web surfers’ Web browser. Most current Web browsers support this format, transparently uncompressing the data and presenting it on the screen. This can significantly reduce bandwidth charges if you are paying for Internet [...]
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