grub, grub-pc, not found

[Stella Gallardo]

I've been following this tutorial:

http://www.parkytowers.me.uk/thin/Linux/TinycoreCF.shtml

Everything goes fine until I get to this part:

 grub --device-map=grub-device.map 

where I get an error: "grub is not installed".

I've tried this command: 

 apt-cache policy grub2 grub-pc

And the output is:

grub2:

  Instalados: (ninguno)

  Candidato:  1.99-21ubuntu3.14

  Tabla de versión:

     1.99-21ubuntu3.14 0

        500 http://es.archive.ubuntu.com/ubuntu/ precise-updates/universe amd64 Packages

     1.99-21ubuntu3 0

        500 http://es.archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages

grub-pc:

  Instalados: (ninguno)

  Candidato:  1.99-21ubuntu3.14

  Tabla de versión:

     1.99-21ubuntu3.14 0

        500 http://es.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages

     1.99-21ubuntu3 0

        500 http://es.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

I can't understand what is happening.

I've tried:

apt-get update

apt-get purge grub grub-pc grub-common

And then:

apt-get install grub-common grub-pc

update-grub

But it doesn't work at all.

Could you help me or suggest something?

Thank you

Stella.