show ip route - Display all routes from routing table

show ip route ospf - Display all routers learned through OSPF from routing table

show ip ospf - Display basic information about OSPF

show ip ospf interface - Display information about all OSPF active interfaces

show ip ospf interface serial 0/0/0 - Display OSPF information about serial 0/0/0 interface

show ip ospf neighbor List all - OSPF neighbors with basic info

show ip ospf neighbor detail - List OSPF neighbors with detail info

show ip ospf database - Display data for OSPF database