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How to flush the DNS cache in Linux
systemctl is-active systemd-resolved
sudo systemd-resolve --flush-caches
$ systemd-resolve --statistics
systemctl restart systemd-resolved.service
How to flush the DNS cache when using BIND
sudo rndc dumpdb -cache
sudo rndc flush
sudo cat /var/named/data/cache_dump.db
How to flush the DNS cache when using Dnsmasq
systemctl is-active dnsmasq
service dnsmasq status
sudo systemctl restart dnsmasq
sudo service dnsmasq restartHow to flush the DNS cache when using nscd
systemctl is-active nscd
service nscd status
sudo nscd --invalidate=hosts
sudo nscd -g
$ sudo nscd -g