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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.

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Partition Image is a Linux/UNIX utility which saves partitions in many formats (see below) to an image file. The image file can be compressed in the GZIP/BZIP2 formats to save disk space, and split into multiple files to be copied on removable floppies (ZIP for example), … Partitions can be saved across the network since version 0.6.0.When using Partimage, the partitions must be unmounted.

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qmail is a mail transfer agent that runs on Unix. It was more secure replacement for the popular Sendmail program. The author offered a $500 prize for the first person to publish a verifiable security hole in the latest version of the software.

Drivel is a GNOME client for working with online journals, also known as weblogs or simply blogs. It retains a simple and elegant design while providing many powerful features.

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Secure Shell is a program to log into another computer over a network, to execute commands in a remote machine, and to move files from one machine to another. It provides strong authentication and secure communications over unsecure channels. It is intended as a replacement for telnet, rlogin, rsh, and rcp. For SSH2, there is a replacement for FTP: sftp.This might be useful if you are trying to connect everytime to your server remotely.

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Kubuntu is a user friendly operating system based on KDE, the K Desktop Environment. With a predictable 6 month release cycle and part of the Ubuntu project, Kubuntu is the GNU/Linux distribution for everyone.

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This is detailed step step debian networking tutorial for Beginners and advanced users.This includes Configuring your network using GUI,Command line,using ifconfig with examples and troubleshooting your network tips.

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Synaptic is a graphical user interface (GUI) for managing software packages on Debian-based distributions. If you are using Debian or Ubuntu you will easily find Synaptic in the System Tools menu or in the Administration menu. Synaptic uses the GTK graphic libraries . So, if you are using GNOME on your debian-based distro you will probably have Synaptic installed as well. Synaptic is a graphical package management program for apt. It provides the same features as the apt-get command line utility with a GUI front-end based on Gtk+.

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Like dd, dd_rescue does copy data from one file or block device to another.dd_rescue is a tool to help you to save data from crashed partition. It tries to read and if it fails, it will go on with the next sectors where tools like dd will fail. If the copying process is interrupted by the user it is possible to continue at any position later. It can copy backwards.

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I have recently upgraded Fedora Core 2 to Fedora Core 3 using Yum. The steps are outlined below:

1. Import the Fedora RPM-GPG-KEY if not done so already.
   
   # rpm --import /usr/share/rhn/RPM-GPG-KEY-fedora

2. Force install fedora-release and yum rpms of Fedora Core 3.
   
   # wget http://download.fedoralegacy.org/fedora/3/os/i386/fedora-release-3-8.i386.rpm
# wget http://download.fedoralegacy.org/fedora/3/os/i386/yum-2.1.11-3.noarch.rpm
# rpm -Uvh --force fedora-release*.rpm yum*.rpm
3. Install FC3 kernel. This should also update mkinitrd as a dependency of the kernel.
   
   # yum update kernel
4. Set lilo to use the FC3 kernel prior to rebooting.
   
   # lilo -v -v
# lilo -R 2.6.12-1.1381_FC3
5. Remove any old existing kernels.
   
   # yum remove kernel-2.4*
6. Continue with the upgrade.
   
   # yum upgrade
7. If you get any "Dependency Errors", the mentioned packages needs to be removed prior to a successful yum upgrade.
   

8. Reboot once the upgrade is successful.