Hi Gert, Thanks for the indications. That give some ideas I will try this tonight. I am using Ubuntu 9.04 too (x32 and x64). May be I was not clear in my previous post. The Linux User I am trying to block the usage of Wine is a low privilege user. This User doesn't know installing package and doesn't know compiling or UNtar or anything. The only thing this user does on the computer is to surf the web. And I would like to prevent this user from accidentally execute a Win exe in wine. I will try your suggestion if it doesn't work then I will go for the absolute solution which mean removing Wine from the computer.