How can I use my laptop as a 2nd monitor?

How can I use my laptop as a 2nd monitor? I have tried looking for a solution for this for a long while.
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Total answers/comments: 2

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bert [Entry]

What you are looking for is an XDMX kind of technology.

bert [Entry]

I know this doesn't help for linux, but I frequently use my laptop as a third monitor using MaxiVista.