[ubuntu] how to permanently disable wireless

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http://ubuntuforums.org – i don't use wireless on my desktop so i would like it permanently disabled... each time i boot up it's back and receving up to 80mb of data from an unknown connection via wireless (i dont use wireless) so, to avoid any weird connections to my neighboors house or some kid hacking the neighborhood driving by with a wireless router in his truck i'd like to permanently turn off wireless this is kind of funny because i had a hard time getting wireless to work on my laptop, but this is my desktop where i do not want it. i looked it up and your forum back in 2007 said to type in iwconfig in the shell then get the nickname of the wireless card then to black list the wireless card i did this but it didn't work, so what do i do now? i have ubuntu 9.10 (HowTos)