tfenv is a Terraform version manager that allows you to easily switch between different versions of Terraform on your machine. It is a command-line tool that can be used to manage and install different versions of Terraform.

To upgrade Terraform using tfenv, you can follow these steps:

Install tfenv if you haven't already done so. You can refer to the official tfenv documentation for instructions on how to install it on your operating system.

List the available versions of Terraform that you can install by running the following command:

tfenv list-remote


This will display a list of all the available versions of Terraform that you can install. Find the version that you want to upgrade to and make a note of its version number.

Install the desired version of Terraform by running the following command:
tfenv install <version>


Replace <version> with the version number of the Terraform version that you want to install. For example, if you want to upgrade to version 1.0.2, you would run the command tfenv install 1.0.2.

Verify that the new version of Terraform is installed correctly by running the following command:
terraform --version

This will display the version number of the currently active version of Terraform.

Note that when upgrading to a new version of Terraform, it's a good practice to test your configuration files in a non-production environment before deploying them to production. This can help you catch any issues or incompatibilities that may arise due to changes in the new version of Terraform.