NAME

       ykclient - YubiCloud One-Time-Password Validation Client

SYNOPSIS

       ykclient [OPTION]... CLIENTID YUBIKEYOTP

DESCRIPTION

       Validate  the  YUBIKEYOTP  one-time-password  against  the YubiCloud using CLIENTID as the
       client identifier.

       Mandatory arguments to long options are mandatory for short options too.

       --help Display this help screen

       --version
              Display version information

       --debug
              Print debugging information

       --url URL
              Validation service URL, for example, "http://api.yubico.com/wsapi/verify"

       --ca CADIR
              Path to directory containing Certificate Authoritity, e.g., "/usr/local/etc/CERTS"

       --apikey Key
              API key for HMAC validation of request/response

       Exit status is 0 on success, 1 if there is a hard failure, 2 if the OTP  was  replayed,  3
       for other soft OTP-related failures.

REPORTING BUGS

       Report bugs at <https://github.com/Yubico/yubico-c-client>.