Showing headlines posted by aweber

Stream filtering allows you to take a text file, extract only the specific data that you want to see, and then to display it in the manner that you want to see it.  You'll get to see several text-stream filtering utilities to help you do this.  In order to show you the full power of these utilities,  here is a quick review on the concepts of pipes and redirectors.

You may need to export variables in some circumstances in order to use them. The export command places the variable in the environment. The environment, which is the list of name-value pairs like PATH, is inherited from the parent process. The export command allows the child process to modify the environment.

One of the major concepts of creating checks is to remember that all plugins with Nagios will require three elements to be configured. There must be a host definition, a service definition and a command definition. Think of it as a triangle each time you want to use a plugin.

One item on my shopping list this holiday season is a Linux-based tablet device. I decided to check the Sunday ad section and put together this list of Black Friday 2010 Linux Tablet Deals.

Nagios is both a powerful and flexible network monitoring tool for checking devices and applications. The power of Nagios is in the ability to monitor many different network devices at one time using various methods to monitor those devices. The flexibility of Nagios provides an administrator the tools to monitor just about anything that is connected to a network. In addition, Nagios allows the administrator to monitor both the external ports and internal application processes on those devices. Monitoring would not be complete without multiple methods for contacting administrators which Nagios also provides.

awk supports user defined variables as well as variables that are predefined. These variables do not need to be declared like they do in bash scripts. There are three types of variables.

Regular expressions provide a robust set of features in the Bash Shell. This article lists 13 features you need to know about regex.

Included in the Linux Mint 10 release are some significant improvements to the Linux Mint main menu. Mint users can now install applications, add GTK bookmarks, apply GTK themes and more. I've taken a video and some screenshots highlighting the new menu features in action.

The awk utility provides a powerful way to search for text strings using regex. This great tool will help you solve many Bash shell script needs.

The Bash Shell provides the ability to create symbolic names which the shell stores in memory and which can be assigned values so that it can be used repeatedly in a shell script.

The Bash Shell utilizes a structure for commands that can be used with the shell. This article demonstrates how to use command, options and arguments.

The awk utility provides a powerful tool for searching patterns and printing them in the desired format. This is an introduction to awk with examples.

Manage your TCP connections with Keep-Alive settings on a Postfix mail server for better performance or increased reliability with client connections.

ArtistX is an Ubuntu GNU/Linux-based live DVD that includes a pretty big lineup of free multimedia applications. The most recent version, ArtistX 0.9 is based on Ubuntu 9.10 and features the 2.6.31 Linux kernel, GNOME 2.28, KDE 4.3.5, Compiz Fusion, Ubiquity Installer, and more.

I wreck servers on a regular basis. Yep, I build and wreck multiple servers every day. As a Linux trainer I am always demonstrating how to build Linux servers in class and then blowing them away. Did it today, built an Ubuntu 10.04 server with Postfix and added the UFW firewall settings, mutt, changed the DNS to get mail going and even, made an image of that server and blew it all away. But today was different, today I used the RackSpace Cloud. Yep, I created an account for $.03 per hour built and destroyed Linux servers.

Have you ever wanted to move mail from an old account to a new account? This tutorial will show you how to use fetchmail with PostfixAdmin.

The most recent release of Puppy Linux, version 5.1 “Lucid Puppy” includes some significant changes such as binary compatibility with the Ubuntu 10.04 packages, easier package installation with Quickpet and Puppy Package Manager, a new Simple Network Setup utility and more. I dove into Puppy 5.1 over the weekend, took some screenshots, and made a video showing a few of Lucid Puppy's features.

I've taken some screenshots of the recently released Backtrack 4 R1 which features a full Fluxbox desktop environment, a new 2.6.34 kernel, and several other changes.

Vector Linux is a lightweight Linux distribution based on Slackware Linux. Today the SOHO (Small Office/Home Office) Edition of Vector Linux 6.0 was released, this edition is targeted at modern computers in an office environment.

Just like previous releases this new release Peppermint OS One-08042010 is based on Ubuntu and includes the LXDE desktop environment with web applications integrated into the desktop using Prism. It includes many bug fixes, new artwork and several new features.