Weekend rest at home, suddenly the alarm shows that the online service Down, after two minutes of normal startup of the system, the alarm also shows recovery, then log in to the Server to see what causes, a view of the logs, there are a large number of can not start the OpenSSH daemon wrong day logs, which led to the system restarted by itself.
Viewing Log Messages

Checking sshd status

prescription
⚠️ 注意 Because the following operation will be performed to restart the ssh service, so it is best to have a background management interface or VNC console, etc., are not then open telnet service.

Check the status of the sshd service

sshd status display activating (start)
https://huoshen.pages.dev/p/743384e2/