[[http://blog.livedoor.jp/tdyk919/archives/956867.html|How to use OKI 810dn on Ubunts]]

=== Installation ===
 1. Select "AppSocket/HP JetDirect"
 2. IP:10.4.7.41
 3. Port:9100
 4. Driver:oki, C5800

=== Other setting ===
 5. "Printer Options" tab, "Color Mode" -> Color
 6. "Printer Options" tab, "Page size" -> A4
 7. "Printer Options" tab, "Media source" -> Tray1, and rotate A4 papers to 'tate' if it was A4 'yoko'