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To install Terraform Refer https://developer.hashicorp.com/terraform/tutorials/aws-get-started/install-cli   on Install Terraform  on Ubuntu or Debian Linux, use the following steps:

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1.  Open a terminal window. 

2. Ensure that your system is up to date and you have installed the  gnupg, software-properties-common, and  curl packages installed. You will use these packages to verify HashiCorp's GPG signature and install HashiCorp's Debian package repository.

sudo apt-get update && sudo apt-get install -y gnupg software-properties-common

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3. Install the HashiCorp GPG key.

wget -O- https://apt.releases.hashicorp.com/gpg | \

gpg --dearmor | \

sudo tee /usr/share/keyrings/hashicorp-archive-keyring.gpg > /dev/null

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4. Verify the key's fingerprint.

gpg --no-default-keyring \

--keyring /usr/share/keyrings/hashicorp-archive-keyring.gpg \

--fingerprint

5. The  gpg command will report the key fingerprint:

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6. Add the official HashiCorp repository to your system. The lsb_release -cs  command finds the distribution release codename for your current system, such as buster, groovy, or sid .

echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] \

https://apt.releases.hashicorp.com $(lsb_release -cs) main" | \

sudo tee /etc/apt/sources.list.d/hashicorp.list

7. Download the package information from HashiCorp.

sudo apt update

8. Install Terraform from the new repository.

sudo apt-get install terraform

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