Troubleshooting
Permissions issues when installing tfswitch
install: can't change permissions of /usr/local/bin: Operation not permitted"Unable to remove symlink. You must have SUDO privileges""Unable to create symlink. You must have SUDO privileges"install: cannot create regular file '/usr/local/bin/tfswitch': Permission denied
Solution: You probably need to have privileges to install tfswitch at /usr/local/bin
Try the following by installing tfswitch to your local bin directory instead:
mkdir -p "$HOME/.local/bin"
curl -L https://raw.githubusercontent.com/warrensbox/terraform-switcher/master/install.sh | bash -s -- -b "$HOME/.local/bin"
$HOME/.local/bin/tfswitch --version # test executable: should print the version of tfswitch
export PATH="$PATH:$HOME/.local/bin" # you should consider adding this to .bash_profile in your $HOME directory.
# Install Terraform 0.11.7 to $HOME/.local/bin/
tfswitch -b $HOME/.local/bin/terraform 0.11.7
# Invoke selection menu and install to $HOME/.local/bin/
tfswitch -b $HOME/.local/bin/terraform
See the custom directory option -b:

PGP signature verification error when installing Terraform 1.14.9+
When installing Terraform 1.14.9 or later using tfswitch v1.16.0 or earlier, or after upgrading to v1.17.0+ without clearing the locally cached HashiCorp PGP key:
ERROR Could not verify PGP signature using key №1 (out of 1): Signature Verification Error: Invalid signature caused by openpgp: key expired
FATAL Error downloading: Unable to verify checksum signature against PGP key
Solution: Your locally cached copy of HashiCorp's PGP public key is stale. Starting with Terraform 1.14.9, HashiCorp began signing releases with a refreshed key block after the original key block expired. This was fixed in tfswitch v1.17.0 / v1.17.1, but upgrading alone is not enough — if tfswitch had already cached the key before that point, the stale single-block file remains on disk and the same error persists. Delete (rename to preserve just in case) the cached file so tfswitch re-downloads the current key:
mv ~/.terraform.versions/terraform_72D7468F.asc ~/.terraform.versions/terraform_72D7468F.asc.old
tfswitch <version>