tmpfs on RAM howto

[Rakotomandimby Mihamina]

Hi,
I have a large amount of RAM (2go) on a laptop, and a friend adviced me
to mount tmpfs into the RAM.
When I 'free' or 'top' I see the RAM is never fully used.
Unfortunately, I dont know how to do that.
I'm running FC4. Would you know a "Fedora compliant" method to ilplement
such a thing?
Is it just about editing fstab? what value with (how to specify I want
to use the RAM)
Thank you.

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