For the artifact database
# su - postgres
$ createuser --no-createrole --no-superuser --pwprompt --no-createdb artifacts
$ createdb --encoding=UTF-8 --owner artifacts artifactsdb

For the flys database

# su - postgres
$ createuser --no-createrole --no-superuser --pwprompt --no-createdb flys
$ createdb --encoding=UTF-8 --owner flys flystest1