How to flush your DNS cache Once upon a time, the DNS cache was flushed with a command like: sudo systemd-resolve --flush-caches The above command will still work on Ubuntu 20.04.

Troublemaker Flush.M is back from early December with a new set of DNS addresses and a few new tricks. The best way to keep from getting spun by this particular malware is to keep an eye on DNS ...

Flush.M 2.0 sets the DHCP lease time to just one hour and does not specify a DNS Domain Name, does not contain PAD options after the END option, and does set the BootP Broadcast Bit.