配置
配置
# /etc/ssh/sshd_config
Banner /etc/ssh/banner.txt
# /etc/ssh/banner.txt（示例：不含系统版本信息）
Authorized access only. All activity is logged.
sshd -t && systemctl reload sshd
ssh test@10.0.0.9 # 登录前应显示横幅/etc/issue 与 /etc/issue.net 面向控制台与其它通道，与 SSH Banner 是两套配置，注意区分。