[gentoo-user] update gentoo without network

[Raffaele BELARDI]

I have gentoo system A (~x86) on a network that does not allow portage 

access to internet due to some authentication issue. System B (~amd64) 

is on another network with no such restrictions.



To bypass the restrictions I made a copy of A on a removable media, 

chroot into it from B and 'emerge-webrsync; emerge --fetchonly' from 

there. Then attach the media to A and overwrite /usr/portage with the 

updated one from the removable media.



This works but updating the chroot from B always re-downloads all the 

packages since the first time I created the chroot, not only those from 

the last update. I suppose portage maintains a database of the installed 

packages that I need to copy back to the removable media after each 

system A update, but where is it?



thanks,



raffaele