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From: Martin Vaeth <martin@mvath.de>
Subject: [gentoo-user] Re: emerge --sync
Date: Mon, 24 Oct 2016 15:29:24 +0000 (UTC)
Message-ID: <slrno0sa6n.136.martin@lounge.imp.fu-berlin.de>
References: <CAKpSnpJuCF3224pk8PnZ8SDtx-oYPMY+sHpWkcfroW1nu=w-2A@mail.gmail.com>
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Jorge Almeida <jjalmeida@gmail.com> wrote:
> I want to do emerge --sync on computer A and then update computer B by
> copying /usr/portage. Is this safe?

Yes, although ...

> does emerge --sync just updates the contents of /usr/portage

portage also changes the content of /var/cache/edb, and in some
cases even of /var/db or even of binary packages, but it will
repeat the necessary steps automatically if only /usr/portage
has changed.