Neil Bothwick wrote:
> uninstalled packages. Copy the world file from the other machine
> somewhere other than /var/lib/portage and run
>
> emerge -n $(cat /path/to/otherworld)
>
>
>   
> Only one, portage will barf when you have a world file containing

I've never seen that, and yes, I've been known to add a package atom to
the end of the world file when I wanted to update world, and add a
package at the same time (xfce4 was the last time I  think, a month or
so ago), and didn't want to do it in two commands.....

In that cases I was adding a whole DE, so was also changing lots of USE
flags, so wanted an emerge -uDavN world to just update all the use flags
at once.... echo "xfce-base/xfce4" >> /var/lib/portage/world followed by
emerge -uDavN world worked a treat.....