Server

Before you update your Nagios XI server be sure to create a good backup that could be used to recover if there are problems.  This article provides you a script that you can use to backup Nagios XI before an upgrade and shows how to perform the upgrade of Nagios.

The screen application can be used to make sure users do not leave accounts logged in.  You can set an automatic log out when an idle time has been reached.

This example of a minimal desktop shows how to manually create partitions using ext3 and ext4 for a server that has a minimal desktop for a graphical interface.

There are a lot of new options to explore in CentOS 6 during install, be sure that you have a basic understand of what the options are before you begin the installation.

The Haraka mail server is able to used common plugins like Spamassassin to enhance the features that it provides.  Using Spamassassin with Haraka is easy to do and reduces the normal resources used by a mail server.

The firewall configuration on CentOS 6 has changed.  This article shows how to add your own firewall rules to the configuration.  CentOS 6 has more options with the firewall than previous versions.

Setting up the Haraka mail server to accept mail into a queue. This is the second in a series on how to configure and use this unique mail server.

The primary reason for adding these repositories is that neither the CentOS repository nor the rpmforge repository contain the same packages that were available in CentOS 5.x. There is some serious lag time which will cripple your ability to move to CentOS 6.

Many Linux mail servers use clamav to scan for viruses. This application is dependable and has a history of updating virus rules quickly as new viruses are discovered.

etckeeper is a set of tools that allows you to maintain the /etc directory in a git, mercurial,darcs or bzr repository. This allows an administrator to commit changes once they have been reviewed.