Programming | Breek Een Been

Executing Bash Scripts Withinfrom Powershell

Tue, 19 Apr 2011 13:41:31 +0200

Sometimes you have processes which use multiple systems and if you are real lucky they cover multiple OS flavors, in this case I had a process which needs to make changes on Windows and Linux servers. Since Powershell was relatively new to me, I thought why not start with that. The Windows part was easily covered, but the Linux part, well euhm, takes a bit more effort. Unfortunately it is not possible (at least I don’t know how) to execute commands directly from Powershell within the Linux servers, so we had to create a workaround. It is easy to do this with the help of “ plink”, plink is a backend tool for Putty and makes it possible to run SSH commands on a command line bases. Now we have tool which can execute commands through SSH within a Linux machine, it is relatively easy :-) See the example below. The bash script (helloworld.sh) which we want to execute:

#!/bin/bash

function helloworld(){
  for i in {0..9}
    do
      echo "Hello World!";
    done
}
helloworld;

The Powershell script (testbash.ps1) which executes the bash script:

#Invoke-Expression -Command "& 'C:Program Files (x86)PuTTYplink.exe' root@server ~/helloworld.sh"

XNA 3D Pong

Sun, 07 Mar 2010 20:09:56 +0200

At school we got 2 XNA lessons, just to fill up our last weeks, since I hope to graduate this year. 2 lessons isn’t much, especially when you realize that that’s about 3 hours total. The last assignment of the XNA lessons was to create a simple 3D game with XNA. First I thought this got to be really, really easy, especially cause we build a 3d engine in OpenGL a year earlier. Unfortunately, it was a bit harder then I first thought. Displaying 3D objects in XNA is really easy, but creating a game with it, is a bit harder. There are just tons of tiny little things you just have to know, like a parent bone? I had never heard of it, but it is a bit essential when you create your own objects and want to use them. After all, with a lot of help from my friend called “The almighty Internet”, it seems that it is possible to create a very basic, simple 3D game in one day. Luckily for me, we have to work in pairs, so my classmate may fill in all the details :-). For those who are curious, here is the source code, but remember, I’m a complete n00b at XNA.

Some Examples of Design Patterns

Fri, 06 Jun 2008 21:14:11 +0200

Do you know that great feeling, when you learn something and it felt just into the right spot? This was happening to me, when I learned the existence of design patterns.

I don’t program for a living, but it has always been a great hobby of mine. So when I found out, actually it was told to me what design patterns are and what they do. I was astunished, why didn’t I know this stuff? It is great to see some practical solution for things you ran into so many times, while coding.

So design patterns are still new for me, but for school we had to work some of those patterns out in real code and since I’m very, very kind :-) and know what a suprise design patterns can be if you get the clue of them. I putted them on the web.

So here they are four patterns I turned into real Java code. The downloads include the Java code, an image of a class diagram and the Umbrello file, which I used to create the class diagram. These are just examples, if you really wanted to know how the pattern work I would suggest you buy the “Gang Of Four” book or search the Internet, there is plenty of information about those patterns.

Observer Pattern

Sorry for you non Dutch readers, some names and comments are in Dutch, but most of the code will speak for themselves.