BIND9 – View DNS Cache

To dump the BIND9 cache do:

# rndc dumpdb -cache

This will generate a ‘named_dump.db’ file in the cache directory of the BIND server. To display the file execute the following:

# cat /var/cache/bind/named_dump.db

Other possible cache-dump file location is:

/var/named/data/cache_dump.db

To clear the cache execute:

# rndc flush

References

1. https://linuxconfig.org/how-to-view-and-clear-bind-dns-server-s-cache-on-linux