install helm-v3.9.0 via binary
wget https://get.helm.sh/helm-v3.9.0-linux-amd64.tar.gz
tar zxvf helm-v3.9.0-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/helm
helm help
wget https://get.helm.sh/helm-v3.9.0-linux-amd64.tar.gz
tar zxvf helm-v3.9.0-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/helm
helm help