Flush DNS on Mac


Making DNS changes and wanting to force a flush on a Mac?

Here are the commands for the different mac versions:

MacOS VersionCommand
macOS 12 (Monterey)sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
macOS 11 (Big Sur)sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
macOS 10.15 (Catalina)sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
macOS 10.14 (Mojave)sudo killall -HUP mDNSResponder
macOS 10.13 (High Sierra)sudo killall -HUP mDNSResponder
macOS 10.12 (Sierra)sudo killall -HUP mDNSResponder
OS X 10.11 (El Capitan)sudo killall -HUP mDNSResponder
OS X 10.10 (Yosemite)sudo discoveryutil udnsflushcaches
OS X 10.9 (Mavericks)sudo killall -HUP mDNSResponder
OS X 10.8 (Mountain Lion)sudo killall -HUP mDNSResponder
Mac OS X 10.7 (Lion)sudo killall -HUP mDNSResponder
Mac OS X 10.6 (Snow Leopard)sudo dscacheutil -flushcache
Mac OS X 10.5 (Leopard)sudo lookupd -flushcache
Mac OS X 10.4 (Tiger)lookupd -flushcache

Raspberry Pi + Java R2D2 Robot – Part 2


We started this project during the pandemic, back in 2020 as project for my kids.

Today R2D2 gave it’s first baby steps on the house. Lot’s of work ahead handling obstacles, video recognition, among others… but a lot of fun!

My kids practicing some soldering….

Part 1 is documented here: https://vivani.net/2020/04/27/raspberry-pi-java-r2d2-robot-part-1/

Java code available here: https://github.com/hvivani/Robotics/tree/master/R2D2