freebsd-update is used to upgrade the FreeBSD main system components. It is updated independently of any packages installed.
freebsd-update
For first time usage:
freebsd-update fetch freebsd-update install
Trace: • ubuntu_release_upgrades • nslookup • rubygems • os_x • mkfs.xfs • mysql_character_sets • netatalk • mysqldump • nvram • freebsd-update