报错：: Connection refused 
已排查问题 
1.SSH服务是正常运行的 
 sudo systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/usr/lib/systemd/system/ssh.service; disabled; preset: enabled)
     Active: active (running) since Tue 2025-10-21 22:30:40 CST; 1h 5min ago
    ...
    Oct 21 22:30:40 Rose-lin17 sshd\[2112\]: Server listening on 0.0.0.0 port 22.
2.防火墙已关闭
 sudo ufw status 
Sta...