.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.49.3. .TH YKCLIENT "1" "March 2024" "ykclient 2.15" "User Commands" .SH NAME ykclient \- YubiCloud One-Time-Password Validation Client .SH SYNOPSIS .B ykclient [\fI\,OPTION\/\fR]... \fI\,CLIENTID YUBIKEYOTP\/\fR .SH DESCRIPTION Validate the YUBIKEYOTP one\-time\-password against the YubiCloud using CLIENTID as the client identifier. .PP Mandatory arguments to long options are mandatory for short options too. .TP \fB\-\-help\fR Display this help screen .TP \fB\-\-version\fR Display version information .TP \fB\-\-debug\fR Print debugging information .TP \fB\-\-url\fR URL Validation service URL, for example, "https://api.yubico.com/wsapi/2.0/verify" .TP \fB\-\-ca\fR CADIR Path to directory containing Certificate Authoritity, e.g., "/usr/local/etc/CERTS" .TP \fB\-\-cai\fR CAFILE Path to a file holding one or more certificated to verify the peer with .TP \fB\-\-apikey\fR Key API key for HMAC validation of request/response .TP \fB\-\-proxy\fR ip:port Connect to validation service through a proxy, e.g., "socks5h://user:pass@127.0.0.1:1080" .PP 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. .SH "REPORTING BUGS" Report bugs at .