I want to enable nfs service in PCF. Please let me know the steps.
I am not able to find Ops Manager Installation Dashboard ?
As a developer, there's nothing you can really do. If you do not see the NFS service broker listed when you run cf marketplace, then you need to reach out to your platform operator and ask them to enable it.
As a platform operator, you would need to make sure the functionality is enabled & configured (this is done in Ops Manager), then you would need to expose it to your user's orgs or mark the service as publicly available (done with the cf cli, but as an admin user, see steps 8 & 9 of the previous link).