curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -

echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

sudo apt update

sudo apt install yarn

​

sudo apt remove cmdtest

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -

echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

sudo apt update

sudo apt install yarn

# Ubuntu 20.04

​

sudo apt remove yarn

# And by installing it as the official website explains

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -

​

echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

​

sudo apt update && sudo apt install yarn

$ npm install -g yarn