How to Flush DNS Cache on Ubuntu 18.04 LTS?
First, Right click on the desktop, and then click on 'Open terminal.' After that, follow the methods below:-
Method 1: By using systemd-resolve
Step 1: First check DNS statistics by command below:-
sudo systemd-resolve --statistics
Step 2: Flush DNS cache by command below:-
sudo systemd-resolve --flush-caches
Step 3: Now, Check DNS statistics again
sudo systemd-resolve --statistics
Method 2: Using dns-clean
sudo /etc/init.d/dns-clean start
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