sshd --version

sshd --version
unknown option -- -
OpenSSH_7.4p1, OpenSSL 1.0.2k-fips  26 Jan 2017
usage: sshd [-46DdeiqTt] [-C connection_spec] [-c host_cert_file]
            [-E log_file] [-f config_file] [-g login_grace_time]
            [-h host_key_file] [-o option] [-p port] [-u len]

sshd, sshd logs, sshd -t, sshd -T, sshd_config, sftp