How to set user quota

I've a redhat 9.0 and I want to set a user quota.
but the question is where should I start from and
How ???

:confused: :confused: :confused: :confused:

Here is a link to some Documentation on Enabling Disk Quotas

Why the message came out ..>?

Bad number of arguments.
Utility for checking and repairing quota files.
quotacheck [-gucfinvdmMR] [-F <quota-format>] filesystem|-a