How to Flush/Clean DNS cache in Ubuntu 16.04 and Ubuntu 20.04

In Windows, we useipconfig /flushdnsin Ubuntu 16.04  run this command to flush dns cache:

sudo /etc/init.d/dns-clean restart

or use:

sudo /etc/init.d/networking force-reload

Ubuntu 20.04 

How to Clear DNS Cache on Ubuntu?
We can run the following command to clear the DNS cache on Ubuntu.
 sudo systemd-resolve --flush-caches