To upgrade:
- Take a backup of your existing system
- Download bsd.rd, etc*.tgz, and optionally xetc*.tgz from your nearest mirror.
- Move bsd.rd into a convenient location, such as the root directory.
- Reboot, and select your new bsd.rd at the "boot>" prompt.
- Select the Upgrade script, and upgrade from your nearest mirror.
- Reboot, then run sysmerge(8) using the *etc* files you downloaded earlier, to update /etc/ and /var configurations.
- Reboot a second time after the sysmerge has completed.
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Edited to add a most important step
Step 0: Review the following -current FAQ, make note of architectural changes between your existing -current and today. If anything is needed that is not managed by sysmerge(8) -- you will need to make those changes by hand.