1YKCLIENT(1)                      User Commands                     YKCLIENT(1)
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NAME

6       ykclient - YubiCloud One-Time-Password Validation Client
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SYNOPSIS

9       ykclient [OPTION]... CLIENTID YUBIKEYOTP
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DESCRIPTION

12       Validate  the  YUBIKEYOTP one-time-password against the YubiCloud using
13       CLIENTID as the client identifier.
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15       Mandatory arguments to long options are  mandatory  for  short  options
16       too.
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18       --help Display this help screen
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20       --version
21              Display version information
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23       --debug
24              Print debugging information
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26       --url URL
27              Validation  service URL, for example, "http://api.yubico.com/ws‐
28              api/verify"
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30       --ca CADIR
31              Path to  directory  containing  Certificate  Authoritity,  e.g.,
32              "/usr/local/etc/CERTS"
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34       --cai CAFILE
35              Path  to  a  file holding one or more certificated to verify the
36              peer with
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38       --apikey Key
39              API key for HMAC validation of request/response
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41       --proxy ip:port
42              Connect  to  validation   service   through   a   proxy,   e.g.,
43              "socks5h://user:pass@127.0.0.1:1080"
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45       Exit status is 0 on success, 1 if there is a hard failure, 2 if the OTP
46       was replayed, 3 for other soft OTP-related failures.
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REPORTING BUGS

49       Report bugs at <https://github.com/Yubico/yubico-c-client>.
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53ykclient 2.15                    January 2023                      YKCLIENT(1)