类似这样: Mar 23 14:45:03 VM-4-16-opencloudos sshd[988302]: Received disconnect from 174.138.24.127 port 35340:11: Bye Bye [preauth] Mar 23 14:45:03 VM-4-16-opencloudos sshd[988302]: Disconnected from authenticating user root 174.138.24.127 port 35340 [preauth]