Originally posted at https://lazybottom.blogspot.com/2009/06/pdwmgdmdw.html on 2009-06-09. # Intro Hello, world! This is my first serious attempt at blogging, so please bear with me. Since I am just finishing my thesis and it is about graph rewriting in functional languages, particularly in Haskell, I thought that I could post some ideas that come to my mind about such things so when someone hopefully reads all this, he/she will be shocked by how much I can complicate such simple matters and post a really elegant solution to my problems. :) Aside from Haskell, I am also a system administrator at one of Hungary's largest universities, [Eotvos Lorand University of Sciences](http://www.elte.hu/) (I am in charge of the [Caesar cluster](http://www.caesar.elte.hu/)), so it is possible that some posts concerning general UNIX issues will eventually slip in. Well, here goes nothing...