Clear Cache On BIND9. It is as simple as: 1, rndc flush. rndc flush. Filed under Linux, Server · Click here to cancel reply. Leave a Comment. Name (required).
If you know the records that are wrong, then you may be able to delete them from cache without restarting your nameserver or flushing the entire cache.
The cache is held only in RAM. However you can view it with rndc dumpdb -cache which will be saved (on Debian and Ubuntu) by default to /var/cache/bind/.