DNS/BINDについて、ここに記述してください。

https://ftp.isc.org/isc/bind9/


https://linuxconfig.org/how-to-view-and-clear-bind-dns-server-s-cache-on-linux
How to view and clear Bind DNS server's cache on Linux

how we can view all cached domain name resolutions: 
 # rndc dumpdb -cache

Clear cache
The following linux commands will assist you if you wish to clear your Bind server's cache. First, flush all cache entries:

# rndc flush

Once done, reload bind:

# rndc reload
server reload successful