ykinfo

Show YubiKey info

$ ykinfo -a

$ ykinfo -s

$ ykinfo -v

$ ykinfo -c

ykinfo [-a] [-s] [-v] [-c] [options]

ykinfo queries a connected YubiKey device and displays its identification information. It can report the serial number, firmware version, and supported capabilities of the hardware token.
The -a flag shows all available information at once. Individual flags like -s (serial), -v (version), and -c (capabilities) display specific details. Quiet mode (-q) outputs values without labels for use in scripts.
When multiple YubiKeys are connected, the tool can select a specific device by serial number. It is part of the yubikey-personalization package and is useful for diagnostics, inventory, and scripting around YubiKey management.

-a

All information.

Serial number.

Firmware version.

Capabilities.

Quiet mode.

YubiKey required. USB connection. Part of yubikey-personalization.

ykinfo is part of yubikey-personalization, providing information about connected YubiKey devices.

ykman(1), ykpersonalize(1), gpg(1)