[Koha] reset admin password

How do I reset Koha's admin password so I can log into the Web-based administrative interface? An embarrassingly long time ago, ran some command that seemed to wipe out a whole lot Koha's preferences. Since then I have not been able to log into the Web-based administrative interface on port 8080. How to I create a username/password combination so I can use the administrative backend again? -- Eric Morgan Infomotions, LLC