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This bug was initially created as a copy of Bug #1802521

I am copying this bug because: 

Also applies to RHEL 8, but it's less "critical" because our documentation always specifies "--regenerate-all" now.

Description of problem:

dracut --help doesn't advertise --regenerate-all option.

Due to this, I was convinced that executing "dracut -f" without other argument was rebuilding everything, instead it just does this for the current kernel.
This is hence confusing and this option should be advertised.

See also PR https://github.com/dracutdevs/dracut/pull/722

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (dracut bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:1661