tool · inferred from evidence
gpg-agent
A tool used to manage keys, including those for Yubikeys, and provide SSH agent functionality.
- Teleport tsh Yubikey gpg-agent SSH_AUTH_SOCK issues login agent certificate
When gpg-agent is running (used by Yubikeys to hold keys), `tsh` adds SSH certificates to the agent, which gpg-agent does not understand (gpg-agent does not support SSH certificates). This breaks logins and agent forwarding for Yubikey user