Adding Users and Aliases for Postfix
"Postfix is a great mailer, but if you're new to administering Postfix, finding your way around can be difficult. For example, just finding information on adding users to a Postfix system can be quite a trial.
"In part, this is because Postfix can be set up in a number of ways. Some installations use Postfix alone, others use Postfix in conjunction with other apps and store user information in MySQL. You can have users who have actual accounts on a system, or you can have users on virtual domains that don't have a login but still receive mail. Or you might want aliases that include several users, so everybody on the "marketing" list gets mail or all folks in sales, legal or development can receive messages.
"For this tip, I'll assume that you've inherited a Postfix domain and want a way to add users or aliases quickly."
Complete Story
Related Stories:
The Perfect Server - Ubuntu Maverick Meerkat (Ubuntu 10.10) [ISPConfig 2](Oct 20, 2010)
Replace Outlook Webmail with Open Source Zarafa(Oct 11, 2010)
Sign emails with OpenDkim + Postfix + Ubuntu 10.04 64x(Oct 04, 2010)
Setting Up A Mail Server Using Exim4, Clamav, Dovecot, SpamAssassin And Many Mor(Sep 23, 2010)
How To Automatically Add A Disclaimer To Outgoing Emails With alterMIME (Postfix(Sep 22, 2010)
PostfixAdmin and Fetchmail(Aug 27, 2010)
Radio Tray
[ Thanks to linuxaria for this link. ]
"Maybe today I?ve finally found an acceptable way to listen to web radio. Often I like to work with music, but after listening for the umpteenth time my favorite CD of Nirvana or Foo Fighters I want to switch to a bit of Web Radio, and here is my doubt ?how??"You can go to the website of the radio and probably find the link ?listen live?, or equivalent that will start a nice flash player, not so easy right?
"An acceptable alternative that I used to date has been Exaile. Exaile is a music manager and player for GTK+ written in Python. It incorporates automatic fetching of album art, lyrics fetching, Last.fm scrobbling, support for many portable media players, internet radio such as shoutcast, and tabbed playlists."
Complete Story
Related Stories:
Introduction to LVS, Linux Virtual Server(Nov 05, 2010)
7 Uncommon uses of Iptables(Nov 03, 2010)
Open Hardware and Arduino(Nov 03, 2010)
Cryptography and digital sign with GnuPG part 2(Oct 29, 2010)
Cryptography and digital sign with GnuPG(Oct 27, 2010)
Globbing with zsh(Oct 26, 2010)
Wiimote on GNU/Linux(Oct 25, 2010)
Pardus 2011 on the road with new goodies
Pardus Linux, a popular independent distribution funded and developed by the scientific and technological research Council of Turkey and version release 2011 in the coming weeks and with him many nice updates and enhancements.
Pardus has an own package management system, PiSi and easy to use graphical front end some attention this developmental cycle has received. The most noticeable change is the addition of tabs. This new tabs make it easier to navigate the various operations as in the Pardus package supports viewing of all packets, installable packages and upgrades packages Manager. This is not only easier for the user, but it saves valuable screen space. Sabayon and Linux Mint, Pardus has a scoring system integrated in the package manager. When the rating stars are clicked, another new feature is revealed: a semi-transparent overlay widget pops up with the package information and application screenshot. Similar overlays are displayed at various times in the course of the with the Pardus package manager how when searches are performed or installable packages.This widget gives Pardus a modern look and feel while actually improve of usability for the user by distracting background Bilder.Darunter hidden improvements have been made to speed up all aspects of package management.
Pardus has always an attractive Installer interface offered, matched normally subject of the version it was installing. Some reviews have declared the most beautiful there, you have seen.Now, this version brings the usual theme updates and a few changes in the user interface and hinzugefügt.hinter of the interface has been added to this version LVM and RAID support functions. Also new is an advanced manual disc partitioning screen, as well as Linux mount points change to more traditional universal.
* The boot splash has been revised with the use of the Plymouth graphical boot system. A beautiful theme and additional customizations are part of the line-up. * LibreOffice is users accustomed to OpenOffice.org offered.* The latest KDE 4.5.2 at this time are featured desktop.The most important before recently web Firefox 4.0 release, currently beta 6, alternative browsers such as chrome and Rekonq.* Linux 2.6.36.Pardus performs well and is quite stable with a variety of Hardware.Jede version is better than that, and 2011 is really good so weit.halten search your eyes open for the announcement of final version is appreciated towards the end of November.
Pardus Linux homepage
Developmental releases download
It's clamfs chowder time!
It's clamfs chowder time!
Ubuntu 11.04 Delayed, Release Schedule Changed
EFF Pioneer Awards 2010 - Our thank you video
The Linux Programming Interface
Behind KDE: Martin Eisenhardt
Linutop OS v4 is out
The Tools to Create Your Next Great Novel
Adding Users and Aliases for Postfix
FSFLA: Linux kernel is "open core"
The new Linux Desktop: Ubuntu's Unity
Get to know Alice
Error al deserializar el cuerpo del mensaje de respuesta para la operación 'Translate'. Se superó la cuota de longitud del contenido de cadena (8192) al leer los datos XML. Esta cuota se puede aumentar cambiando la propiedad MaxStringContentLength en el objeto XmlDictionaryReaderQuotas que se usa para crear el lector XML. Línea 1, posición 8670.
Error al deserializar el cuerpo del mensaje de respuesta para la operación 'Translate'. Se superó la cuota de longitud del contenido de cadena (8192) al leer los datos XML. Esta cuota se puede aumentar cambiando la propiedad MaxStringContentLength en el objeto XmlDictionaryReaderQuotas que se usa para crear el lector XML. Línea 1, posición 8941.
After I wrote a review of the Scratch programing environment, one of our readers suggested that I look into the Alice programing environment. http://alice.org/ Well, I've gotten to know Alice and have found it to be quite an impressive programing environment. By the way, I'm always looking for interesting subjects to write about, so if you have suggestions, please email them to me.
Alice is a programing environment that allows students to learn Object Oriented Programing in a compelling 3-D environment. With Alice, students add objects to a 3-D world and use each object's built-in methods to create animations, interactive stories, or games. When the student is satisfied with their work, they can export it in the form of a standard web page that they can share with their friends, or instructors. Though written in, and primarily aimed at Java, most of the concepts and structures demonstrated in Alice are applicable in just about any modern language.
For this article, I'm using Alice version 2.0.7, and you can see the initial screen in Figure 1. 
In the upper left panel, we have what I would call the object window. Here we see a list of all of the objects used in the project. Once a user selects an object from this list, they can see a list of methods and properties that belong to that object, in the window below, lower left. From there, a user can click on the “edit” button and edit a given method.
The star of the show, of course, is to be found in the lower center window, where we find the code window. In the main part of the code window, you see the code that comprises the current object or method. Along the bottom you see the code elements that can be used to build programs.
To create an object method, all a student has to do is select the object from the object window, then click on the create a method button for that object. From then on, the student simply drags code segments from the bottom of the screen, onto the code panel. A student can create a method parameter or variable by clicking one of the buttons on the right side of the code.
Along the bottom of the code window, we see “Do in order,” “Do together,” “If/Else,”, “Loop,” “While,” “For all in order,” “For all together,” “Wait,” “Print,” and “//.” These are the core code elements available to Alice programmers. Object methods can be brought in by simply clicking on the object in the object window and dragging the needed method into the code window.
“Do in order” is simply a means of grouping instructions that are to be executed sequentially, much like brackets or BEGIN/END groups in other languages. On the other hand, “Do together” is a means of grouping instructions that are to be executed concurrently. This is a fairly advanced feature that opens up the opportunity to explore multi-threaded programing.
The “If/Else” enables a student to create an “if” clause with an optional “else” clause. Once the student drags the “If/Else” into the code window, they will see a conditional expression container, as well as code containers corresponding to the “if,” and the “else” sides of the instruction. The student can drag whatever instructions they wish in each of the code containers. However, I did find the boolean expression creation process to be a bit cumbersome at first. Once I realized that I could drag a variable into the conditional expression container, and that Alice would then walk me through the rest, things went much more smoothly. Using the pick lists provided in the conditional container lead to strange results.
The “Loop” is pretty convenient to use. In it's default mode, the student simply specifies how many times they want the code block to execute. In advanced mode, the student can specify a full C-like construct.
The “While” is used very much like the “If/Else” is, as it should be.
The “For all in order” and “For all together” features allow a program to loop over each element in a list. The list can be created on the fly, or can be a predefined variable. Once either of these code elements are in place, a locally scoped index variable is created that contains the current item from the list.
The “Wait” element simply causes execution to pause for a given number of seconds.
One would think that the “Print” element would be fairly intuitive. However, I wasn't able to determine where the output actually went. But since Alice is primarily a 3-D programing environment, I guess printing is irrelevant.
All Alice programs are built up using these simple code elements, but the real power (and fun) comes from the methods that objects supply to the Alice environment. For example, the camera object supplies methods that move the user's point of view around within the 3-D environment.
Simply moving around in an empty environment would be pretty boring, so let's talk about some of the objects that come with Alice. Objects are loaded from the Gallery and include various types of people, buildings, animals, vehicles, land features and other props.
I think the best way to describe the possibilities is by example. See Figure 3. Here we see one of the example projects which demonstrate the Octopus and Carousel objects. These objects are fully animated, and each provide a unique set of methods. For example, the Octopus object provides a SpinAnimation method that moves the arms up and down and turns the object on it's axis.
On the other hand, the PinkBallerina object provides methods that allow her to be moved within the environment and to “say” messages to the user.
The 3-D environment presented by Alice is compelling, and frankly, a lot of fun. Where else can you have a Japanese Samurai, an Electric Bass, Lunar Lander and a Cowboy in the same place? While I'm not a fan of strict object oriented programming, I do understand the benefits of object oriented programing and Alice is a very good introduction for a fairly advanced class of students.
That said, I did find Alice to be a bit unstable, and at times, a bit counterintuitive. Some of the objects supported some methods that didn't seem to make sense in context, and lacked others that seemed appropriate. But sometimes that is the nature of programing, something most programmers have learned to live with. It's strict object oriented nature and compelling 3-D presentation make Alice a very good introduction to modern programing technique, but it may only be appropriate for fairly advanced, or mature students. As my sons are a bit too young to be able to work with the Alice environment effectively, I would certainly recommend anyone instructing older students, say high school, to consider using Alice as a teaching tool for intermediate to advanced programing.
______________________Mike Diehl is a freelance Computer Nerd specializing in Linux administration, programing, and VoIP. Mike lives in Albuquerque, NM. with his wife and 3 sons. He can be reached at mdiehl@diehlnet.com
