[metapost] I cannot use metapost (mpost)

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 I am trying to compose a lecture, by means of metapost figures. I use a linux computer with UBUNTU, and composed a file example.mp as is described in a paper of Andr'e Heck on "Learning Metapost by doing" , NTG vol.32,2005. When as prescribed, I typed 'mpost example' I got the message: sudo apt-get install texlive - binaries. After some time Texlive was loaded and again I typed 'mpost example'. Now I got the message: Sorry, I can't find the 'mpost' preload file, will try 'plain'. And then: I can't find the 'plain' preload file! 

How should I proceed to use metapost? Thanks, when you can help me.

Wim Maaskant
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