I just upgraded my servers from FreeBSD 6.2 to 6.3 (even though FreeBSD 7.0 will be here any day). Here are the steps to upgrade, make sure to backup!
# fetch http://people.freebsd.org/~cperciva/freebsd-update-upgrade.tgz
Downloading and verifying the digital signature for the tarball (signed by the FreeBSD Security Officer’s PGP key) is highly recommended.# fetch http://people.freebsd.org/~cperciva/freebsd-update-upgrade.tgz.asc
# gpg --verify freebsd-update-upgrade.tgz.asc freebsd-update-upgrade.tgz
The new freebsd-update(8) can then be extracted and run as follows:# tar -xf freebsd-update-upgrade.tgz
# sh freebsd-update.sh -f freebsd-update.conf -r 6.3-RELEASE upgrade
# sh freebsd-update.sh -f freebsd-update.conf install
The system must be rebooted with the newly installed kernel before continuing.# shutdown -r now
Finally, freebsd-update.sh needs to be run one more time to install the new userland components, and the system needs to be rebooted one last time:# sh freebsd-update.sh -f freebsd-update.conf install
# shutdown -r now
For more information, see:http://www.daemonology.net/blog/2007-11-10-freebsd-minor-version-upgrade.html

{ 6 comments… read them below or add one }
Thank you for very useful instruction. All work fine. exclude pgp verification procedure:
1. Misspelling in gpg command. It have to amend “–verify” key to “–verify” (double dashes)
2. It’s no information how obtain and where place an public key (now pgp returns error message: “gpg: Can’t check signature: No public key”)
Solution for “gpg: Can’t check signature: No public key” message:
# fetch http://www.freebsd.org/doc/pgpkeyring.txt
# gpg –import pgpkeyring.txt
gpg command isn’t found..how to solve it ? please reply your my question to my e-mail. Thx
portinstall gnupg
or…
cd /usr/ports/security/gnupg
make install
But either way, you need ports installed.
>Solution for “gpg: Can’t check signature: No public key” message:
># fetch http://www.freebsd.org/doc/pgpkeyring.txt
># gpg –import pgpkeyring.txt
right command
# gpg –import pgpkeyring.txt
# gpg ––import pgpkeyring.txt