I'm using lazarus installed on Debian and i need to use a map file in my application, but I can't find any tutorial online, to be clearer: I want to know how to create a map file, then use it in a multithreaded application, so a principal thread creates that file, then the secondary threads write data on it (so they copy data from a memorystream to a mapfile). I already used a mapfile in windows, but using it on linux is a bit different. Can anyone explain to me how to realise this task? Thanks for your replies