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Ubuntu

Virus Protection With AVG Antivirus On Ubuntu Feisty Fawn

Post date: September 10, 2007, 22:09 Category: Security Views: 4781 Comments
Tutorial quote: This tutorial shows how you can install and use AVG Antivirus on an Ubuntu Feisty Fawn desktop. Although there are not many Linux viruses out there, this can be useful if you often exchange files with Windows users - it can help you to not pass on any Windows viruses (that do not do any harm to Linux systems) to Windows users. AVG Antivirus for Linux is free for private and non-commercial use.
Ubuntu

Virus Protection With F-PROT Antivirus On Ubuntu Feisty Fawn

Post date: September 24, 2007, 08:09 Category: Security Views: 4607 Comments
Tutorial quote: This tutorial shows how you can install and use F-PROT Antivirus on an Ubuntu Feisty Fawn desktop. Although there are not many Linux viruses out there, this can be useful if you often exchange files with Windows users - it can help you to not pass on any Windows viruses (that do not do any harm to Linux systems) to Windows users. F-PROT Antivirus for Linux is free for home use.
Ubuntu

Ten tips for new Ubuntu users

Post date: June 22, 2006, 15:06 Category: Miscellaneous Views: 6999 Comments
Tutorial quote: Ubuntu has become the most popular Linux distribution for new Linux users. It's easy to install, easy to use, and usually "just works." But moving to a different operating system can be confusing, no matter how well-designed it is. Here's a list of tips that might save you some time while you're getting used to Ubuntu.
Debian

Virtual Users And Domains With Postfix, Courier And MySQL (+ SMTP-AUTH, Quota, SpamAssassin, ClamAV)

Post date: October 9, 2005, 18:10 Category: Network Views: 4570 Comments
Tutorial quote: This document describes how to install a mail server based on Postfix that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses.

The resulting Postfix server is capable of SMTP-AUTH and TLS and quota (quota is not built into Postfix by default, I'll show how to patch your Postfix appropriately). Passwords are stored in encrypted form in the database (most documents I found were dealing with plain text passwords which is a security risk). In addition to that, this tutorial covers the installation of Amavisd, SpamAssassin and ClamAV so that emails will be scanned for spam and viruses.
Ubuntu

Running A File- And Print-Server With eBox On Ubuntu 8.04 Server

Post date: August 28, 2008, 11:08 Category: Installing Views: 3510 Comments
Tutorial quote: This article shows how to run a file- and print-server for small and medium enterprises (SME) on one single Ubuntu 8.04 server. It is very easy to set up, and management is done with an easy-to-use web interface called eBox so once the system is set up, you can forget about the command line. eBox was developed to administrate advanced services for corporate networks.
Linux

Port Knocking

Post date: April 16, 2005, 10:04 Category: Network Views: 3724 Comments
Tutorial quote: Firewall administrators are challenged to balance flexibility and security when designing a comprehensive rule set. A firewall should provide protection against malfeasants, while allowing trusted users to connect. Unfortunately, it is not always possible to filter out the bad guys, because filtering on the basis of IP addresses and ports does not distinguish connecting users. Bad guys can and do come from trusted IP addresses. Open ports remain a necessary vulnerability: they allow connections to applications but also may turn into open doors for attack. This article presents a new security system, termed port knocking, in which trusted users manipulate firewall rules by transmitting information across closed ports.
Debian

Automating new Debian installations with preseeding

Post date: May 5, 2006, 02:05 Category: Installing Views: 3216 Comments
Tutorial quote: Anyone doing Debian installations regularly might be interested in the preseed method of the Debian installer. This document describes how to use this technique.
Fedora

Speed Up Your System With Preload On Fedora 8

Post date: March 16, 2008, 12:03 Category: Desktop Views: 3725 Comments
Tutorial quote: This document describes how to install preload on Fedora 8. preload is an adaptive readahead daemon. It monitors applications that users run, and by analyzing this data, predicts what applications users might run, and fetches those binaries and their dependencies into memory for faster startup times.
Debian

Server Monitoring With Icinga On Debian Squeeze

Post date: August 25, 2011, 07:08 Category: Miscellaneous Views: 3240 Comments
Tutorial quote: Icinga is an enterprise grade open source monitoring system which keeps watch over networks and any conceivable network resource, notifies the user of errors and recoveries and generates performance data for reporting. It is a fork of Nagios. This tutorial explains how to install Icinga on a Debian Squeeze server to monitor this server and another Debian Squeeze server.
Debian

High-Availability Load Balancer With HAProxy/Keepalived On Debian Lenny

Post date: June 16, 2009, 10:06 Category: Installing Views: 5545 Comments
Tutorial quote: This article explains how to set up a two-node load balancer in an active/passive configuration with HAProxy and keepalived on Debian Lenny. The load balancer sits between the user and two (or more) backend Apache web servers that hold the same content. Not only does the load balancer distribute the requests to the two backend Apache servers, it also checks the health of the backend servers. If one of them is down, all requests will automatically be redirected to the remaining backend server. In addition to that, the two load balancer nodes monitor each other using keepalived, and if the master fails, the slave becomes the master, which means the users will not notice any disruption of the service. HAProxy is session-aware, which means you can use it with any web application that makes use of sessions (such as forums, shopping carts, etc.).
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