ykinfo:tldr:24a41
The command "ykinfo -a" is used to display information about YubiKey devices connected to your system.
It is a command-line tool that is commonly used on Unix-like operating systems (e.g., Linux, macOS). When executed, it provides a summary of all the installed YubiKeys, including details such as model, firmware version, serial number, supported capabilities, and other relevant information.
The "-a" option specifies that the command should display information for all available YubiKeys connected to the system. If you omit this option and only run "ykinfo" without any arguments, it will display information for the default YubiKey connected.
By using this command, you can quickly acquire important details about your YubiKey devices, making it easier to manage and troubleshoot them.