How to upgrade? A few different ways... I only use one of them, there are guides, using
STABLE
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2nd question, will be clear once you have a few years of experience and know the tradeoffs. Nothing really to answer without a lot of text.
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If you've a non-hobbyist server, there are several ways to keep it upgraded, and will depend upon the physical configuration, amount of hardware, programs used to
upgrade with, etc. (Many ways, many guides, several books). As far as only binaries,
it depends upon which are/would be available, and would vary with each server instance
as to a precise answer.
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FreeBSD 13-STABLE
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