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Openfiler

Openfiler 2.3 Active/Passive Cluster With Offsite Replication Node

Post date: February 10, 2011, 14:02 Category: Installing Views: 4169 Comments
Tutorial quote: Openfiler is a Linux based NAS/SAN application which can deliver storage over nfs/smb/iscsi and ftp. It has a web interface over that you can control these services. The cluster we build will consist of two nodes replicating each other and taking over services and storage in case of emergency. Furthermore we have an Offsite Replication Server, which ideally stands in a physically different position and replicates the configurations/storage from which ever node is active. In case of emergency this Offsite Replication Server can be used to restore the cluster and to deliver the services.
Unix+clones

Easy Automated Snapshot-Style Backups with Linux and Rsync

Post date: February 1, 2006, 00:02 Category: Software Views: 3003 Comments
Tutorial quote: This document describes a method for generating automatic rotating "snapshot"-style backups on a Unix-based system, with specific examples drawn from the author's GNU/Linux experience. Snapshot backups are a feature of some high-end industrial file servers; they create the illusion of multiple, full backups per day without the space or processing overhead. All of the snapshots are read-only, and are accessible directly by users as special system directories. It is often possible to store several hours, days, and even weeks' worth of snapshots with slightly more than 2x storage. This method, while not as space-efficient as some of the proprietary technologies (which, using special copy-on-write filesystems, can operate on slightly more than 1x storage), makes use of only standard file utilities and the common rsync program, which is installed by default on most Linux distributions. Properly configured, the method can also protect against hard disk failure, root compromises, or even back up a network of heterogeneous desktops automatically.
Ubuntu

Make Gimp Panels Auto Hide in Gnome

Post date: June 22, 2009, 10:06 Category: Optimizing Views: 4006 Comments
Tutorial quote: Normally, Gimp panels are de-attached from the main window, so you practically have 3 windows. And that can be bad for productivity and usability. But you can change that to auto-hiding dock panels.
Debian

Debian Network Utilities and tools With Examples

Post date: September 18, 2006, 16:09 Category: Network Views: 4543 Comments
Tutorial quote: This is the list of debian network utilities and tools for administrators and users to check the network related traffic, monitor network.This includes installation of each package with man pages
Ubuntu

Network Analysis With Wireshark On Ubuntu 9.10

Post date: February 21, 2010, 15:02 Category: Installing Views: 3745 Comments
Tutorial quote: Wireshark is a network protocol analyzer (or "packet sniffer") that can be used for network analysis, troubleshooting, software development, education, etc. This guide shows how to install and use it on an Ubuntu 9.10 desktop to analyze the traffic on the local network card.
OpenSUSE

ntop in openSUSE to probe & monitor Network Traffic

Post date: April 10, 2009, 07:04 Category: Network Views: 5891 Comments
Tutorial quote: ntop is a free opensource network traffic probe that shows the network usage. ntop is based on libpcap and can run on Linux/Unix and Windows operating system. ntop provides a very easy to use a web access to navigate through ntop traffic information and get a dump of the network status.
Linux

nBox - Envision your network with nBox (Embedded Ntop)

Post date: May 28, 2007, 22:05 Category: Network Views: 3507 Comments
Tutorial quote: The life of a systems or network administrator requires us to maintain an expansive understanding of our network infrastructure to more effectively manage it. Amidst volumes of complex data that some IT problems present and network management is no exception to these complications. Visual tools allow us to better see trends and make sense of the macro view of our networks. Ntop, nBox, nProbe are just the right FOSS tools that can help us gain greater insight.
Ubuntu

How to Set up Network Bonding in Ubuntu 6.10

Post date: February 16, 2007, 22:02 Category: Network Views: 5553 Comments
Tutorial quote: Network Bonding, otherwise known as port trunking allows you to combine multiple network ports into a single group, effectively aggregating the bandwidth of multiple interfaces into a single connection. For example, you can aggregate two gigabyte ports into a two-gigabyte trunk port. Bonding is used primarily to provide network load balancing and fault tolerance.
Debian

Filtering PDF-/XLS-/Image-Spam With ClamAV (And ISPConfig) On Debian/Ubuntu

Post date: July 24, 2007, 02:07 Category: Security Views: 3264 Comments
Tutorial quote: There is currently a lot of spam where the spam information is attached as .pdf or .xls files, sometime also hidden inside a .zip file. While these spam mails are not easy to catch with e.g. SpamAssassin or a Bayes filter, the ClamAV virus scanner can catch them easily when it is fed with the correct signatures as ClamAV is built to scan mail attachments.
Linux

Cutting the tcp/ip network connection with cutter

Post date: December 13, 2005, 03:12 Category: Network Views: 2894 Comments
Tutorial quote: Recently I came across very powerful and nifty tool (used by one of our Sr. network admin). Just imagine that people in your private network using peer to peer software such as Kazaa, iMesh or others and you want to cut them or just want to cut all ftp connection over my firewall but not all traffic to host.
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