Code:
curlew:/root# freebsd-update -r 14.0-RELEASE upgrade
Looking up update.FreeBSD.org mirrors... 3 mirrors found.
Fetching metadata signature for 13.2-RELEASE from update2.freebsd.org... done.
Fetching metadata index... done.
Inspecting system... done.
The following components of FreeBSD seem to be installed:
kernel/generic kernel/generic-dbg src/src world/base world/lib32
The following components of FreeBSD do not seem to be installed:
world/base-dbg world/lib32-dbg
Does this look reasonable (y/n)? n
curlew:/root#
freebsd-update
or will I need to do a full upgrade from source?