Install React Native

Linux (Ubuntu)

We need nodejs and JDK (and some other packages)

apt update && apt install -y curl gnupg
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
curl -sL https://deb.nodesource.com/setup_8.x | bash -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
apt update &&  apt install -y git nodejs openjdk-11-jdk dbus-x11 chromium-browser build-essential
echo "prefix=${HOME}/.npm-packages" >> ~/.npmrc
PATH="${HOME}/.npm-packages/bin:$PATH"
npm i -g yarn
yarn global add typescript react-native-cli

At the time this was written openjdk was at version 11, so do this:

JAVA_HOME "/usr/lib/jvm/java-11-openjdk-amd64"

MacOS

Install Xcode from https://developer.apple.com/download/more
Open Xcode and go to Preferences->Locations and select the command lie tools.

Install brew:

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Install node (and npm)
brew install node
npm -v
node -v

or from here https://nodejs.org/download/release/

Install jdk from oracle.com

Install yarn, typescript and react-cli
brew install yarn
brew install carthage
yarn global add typescript react-native-cli