Install OpenTofu

Steps

Run the command chain below to add the custom repository before using it to install the tofu package.

sudo apt update \
  && sudo apt install -y apt-transport-https ca-certificates curl gnupg \
  && curl -fsSL https://get.opentofu.org/opentofu.gpg | sudo tee /etc/apt/keyrings/opentofu.gpg >/dev/null \
  && curl -fsSL https://packages.opentofu.org/opentofu/tofu/gpgkey | sudo gpg --no-tty --batch --dearmor -o /etc/apt/keyrings/opentofu-repo.gpg >/dev/null \
  && sudo chmod a+r /etc/apt/keyrings/opentofu.gpg /etc/apt/keyrings/opentofu-repo.gpg \
  && echo "deb [signed-by=/etc/apt/keyrings/opentofu.gpg,/etc/apt/keyrings/opentofu-repo.gpg] https://packages.opentofu.org/opentofu/tofu/any/ any main 
deb-src [signed-by=/etc/apt/keyrings/opentofu.gpg,/etc/apt/keyrings/opentofu-repo.gpg] https://packages.opentofu.org/opentofu/tofu/any/ any main" | \
  sudo tee /etc/apt/sources.list.d/opentofu.list > /dev/null \
  && sudo chmod a+r /etc/apt/sources.list.d/opentofu.list \
  && sudo apt update \
  && sudo apt install -y tofu

This worked on Debian 13 and installed OpenTofu v1.12.6 at the time of updating this post.

References

• OpenTofu - Installing OpenTofu