dnsmasq cache data

dnsmasq is a lightweight DNS server and DHCP server that is commonly used on small networks. When dnsmasq is configured as a DNS caching server, it stores DNS query responses in its cache. This allows dnsmasq to respond to future DNS queries for the same domain names more quickly, as it can retrieve the response from its cache instead of querying an upstream DNS server.

The cache data stored by dnsmasq includes the domain name, the IP address(es) associated with the domain, and the time-to-live (TTL) value of the DNS record. The TTL value determines how long dnsmasq will keep the record in its cache before it expires and needs to be refreshed.

You can view the cache data stored by dnsmasq by running the command `sudo dnsmasq --test --cache`. This will display a list of the domain names and IP addresses currently stored in the cache, along with their TTL values. You can also clear the dnsmasq cache by running the command `sudo service dnsmasq restart`. This will restart the dnsmasq service and clear its cache.