source: https://computingforgeeks.com/how-to-install-terraform-on-ubuntu/
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sudo apt update
sudo apt install -y software-properties-common gnupg2 curl
curl https://apt.releases.hashicorp.com/gpg | gpg --dearmor > hashicorp.gpg
sudo install -o root -g root -m 644 hashicorp.gpg /etc/apt/trusted.gpg.d/
sudo apt-add-repository "deb [arch=$(dpkg --print-architecture)] https://apt.releases.hashicorp.com focal main"
sudo apt update
sudo apt install -y terraform
terraform --version