We want an automated deployment enviroment. The server will automatically (upon restart) detect all the rails applications under a given folder and create virtual hosts for them. No further changes in the server configuration will be required. never. 
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From the wikipedia:
Model-view-controller (MVC) is an architectural pattern used in software engineering. In complex computer applications that present a large amount of data to the user, a developer often wishes to separate data (model) and user interface (view) concerns, so that changes to the user interface will not affect data handling, and that the data can be reorganized without changing the user interface.
MVC is not only useful for web frameworks and applications, here is a simple example of the implementation of the MVC pattern for a Qt GUI application.
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Pinky: Gee, Brain, what are we going to do tonight?
Brain: The same thing we do every night, try to take over the world!
Have you ever wanted to have the ability to send commands to your box using email? Use RubyBot, the brand new plugin-driven ruby script that makes the task of taking over the world a bit easier!
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Menu and status bar are two elements that you expect to find in most applications out there. Menu bars are rich elements that consists of menu items and actions. Each action consists of a text and optionally a shortcut and an icon.
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With Qt’s custom widgets you can create the building blocks of the GUI of your application.
In this case we are creating a graphical command line. The command line will consist mainly of a text input box (Qt::LineEdit). The widget will have memory, that is, every line entered by the user will be added to the internal history of the widget and will be accessible by means of Up and Down arrows as the standard *nix command line.
I am involved in some projects were we are using Qt library for GUI development with ruby. In the following example I will show how to use the Qt::TreeWidget object.
The TreeWidget can be used not only to display information hierarchically but also to add multiple columns to the data model.
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Every now and then I need to send by email some file to a friend or coworker or even myself. I have found that the easiest way to do this is just having a shell script that do the hard work for you.
After some research I found a set of scripts that actually do what I want (credit goes to Heiner Steven). The bad news is that this is not a metasend command to send files as MIME atachments.
I have created a small ruby script to check if there are running servers on a given port number. The script is able to check a list of hosts and will output an informational message on the port status for each host.
Let’s begin with the script. Then we can talk about the work it does.
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Here is a tiny script that can be usefull to terminate (kill -9) all the programs which contain a certain string (i.e.: kill all the running copies of ping).
#!/bin/bash
for foo in `ps aux | grep $1 | awk '{print $2}'`; do kill -9 $foo; doneJust run: matar <program name> and that’s it. They are all gone.
The Timestamp is an ICMP (rfc792) message which is used for time synchronization. The Timestamp Reply message consists of the originating timestamp sent by the sender of the Timestamp as well as a receive timestamp and a transmit timestamp.
If your machine answers ICMP Timestamp messages an attacker can learn the date which is set on your machine. This may help him to defeat all your time based authentication protocols.