Prerequisite
Install make. If you need assistance, see this posting.
Procedures
Run these three commands:
curl https://github.com/gruntwork-io/terragrunt/releases/download/v0.35.18/terragrunt_linux_arm64 --output /tmp/terragrunt_linux_arm64
sudo mv -i /tmp/terragrunt_linux_arm64 /bin/terragrunt
sudo chmod u+x /bin/terragrunt