gcloud config set project projectid

Import key

gcloud auth activate-service-account --key-file=key.json

Debian

echo "deb https://packages.cloud.google.com/apt cloud-sdk main" > /etc/apt/sources.list.d/google-cloud-sdk.list
curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | gpg --dearmor > /etc/apt/trusted.gpg.d/cloud.google.gpg
apt update
apt install -y google-cloud-cli