Does Linux cache DNS?

On Linux, there is no OS-level DNS caching unless a caching service such as Systemd-Resolved, DNSMasq, or Nscd is installed and running. The process of clearing the DNS cache is different depending on the Linux distribution and the caching service you’re using.

Does Linux cache DNS results?

Where is DNS cache in Linux?

In Debian/Ubuntu, that file is /var/cache/nscd/hosts for the hosts/DNS cache, so you can run strings /var/cache/nscd/hosts to see the hosts in cache.

How DNS cache works in Linux?

The DNS cache is useful as it intercepts hostname requests of recently visited websites before they’re sent out to the internet and refers them to its local database. This significantly reduces the time taken to load already visited websites as their respective IP address have already been cached.

Does Linux use DNS?

More Linux resources Getting a response from the DNS server to the DNS client is called a lookup response. The system on which the DNS service is configured is called a DNS server. The system that accesses the DNS server is called a DNS client.