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"

       --cai CAFILE
              Path to a file holding one or more certificated to verify the peer with

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

       --proxy ip:port
              Connect     to     validation     service     through      a      proxy,      e.g.,
              "socks5h://user:pass@127.0.0.1:1080"

       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>.