Upgrade To FreeBSD 13 From FreeBSD 12
Update FreeBSD 12
Check FreeBSD OS version
freebsd-version -k
## or ##
uname -mrs
download and install the FreeBSD
freebsd-update fetch
freebsd-update install
pkg upgrade
reboot
Upgrade to FreeBSD 13 from FreeBSD 12
Upgrade
freebsd-update -r 13.0-RELEASE upgrade
freebsd-update install
Verify
freebsd-version -k
## or ##
uname -mrs