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Thanks a lot php1ic.
There is no problem now. I can use Kubuntu with Kile and see my work in landscape.
(I have change option "build" in Kile)

Hi everybody.
I want to use Kile for my Latex document. So i have install Kubuntu 9.10 and Kile 2.1 beta 3.
My document is :
\documentclass[11pt,landscape,twocolumn]{article}
\usepackage[T1]{fontenc}
\usepackage[latin1]{inputenc}
\usepackage[francais]{babel}
\usepackage{amssymb}
\usepackage{amscd ...