Python library and command line tool for configuring a YubiKey

 YubiKey Manager (ykman) is a command line tool for configuring a YubiKey over
 all transports. It is capable of reading out device information as well as
 configuring several aspects of a YubiKey, including enabling or disabling
 connection transports an programming various types of credentials.
 .
 YubiKey is a specific series of personal Hardware Security Modules,
 meant to protect private keys tied to its users (for 2nd factor authentication,
 use with OpenPGP, ...).