sudo apt-add-repository ppa:yubico/stable sudo apt update sudo apt install yubikey-manager
Your YubiKey must have at least firmware 5.2.x. You can check this to open the YubiKey Manager app. If your YubiKey is lower than 5.2.x, then you can’t make use of this and you need to do a complete reset of your YubiKey.
ykman fido listand enter your PIN to get a list of the credentials that are stored in your YubiKey.
- If you know the credential that you want to delete, type
ykman fido delete [credential]and enter your PIN.
- Press Y to delete the credential.
ykman fido listto check if the credential has been deleted.