This is the one I’ve always used. 

You can grep out specific entries and hand-edit them if you need to make 
changes not otherwise supported by the admin interface. Also you can use this 
method to move full-strength cross-realm keys between installations.

It’s also a great way to undo an otherwise-dangerous experiment. ;-)

> On Apr 2, 2017, at 10:44 AM, Roland C. Dowdeswell 
> <> wrote:
> On Sat, Apr 01, 2017 at 04:59:56PM -0700, Adam Lewenberg wrote:
>> I am looking for a quick way to get a snapshot of the Kerberos
>> database file.
> In addition to the other methods suggested already, you could just:
>       $ kadmin -l dump <file>
> which can be later loaded with:
>       $ kadmin -l load <file>
> Or one could even grep the entries out that you wish to restore and pass
> them to:
>       $ kadmin -l merge <file>
> if, say, you wanted to revert some entries to the dump file that you
> created using the cronjob that we all generally have in place.
> -- 
>    Roland C. Dowdeswell

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