Database Schema Updates

Who is allowed to run the schema updater differs. FOG 1.5 has no roles system — authorization is a plain administrator account-type flag — and it keeps its config file at lib/fog/config.class.php rather than commons/config.class.php.

Which version am I on?

Check FOG Configuration → FOG Settings → General → FOG_VERSION in the web UI, or the version string printed at the top of installfog.sh.