It took one day to update the CentOS kernel on the server in Hetzner, which worked without rebooting for about 2 years.
I looked at various information about the system, the versions of the installed kernels and the running kernel:
lsb_release -a uname -r uname -a cat /proc/version sudo rpm -q kernel ls /boot | grep vmlinuz
yum -y update
Rebooted the server using the link in cPanel https://example.com:2087/scripts/dialog?dialog=reboot
You can also use the command:
After rebooting the server did not start, I immediately made a request for technical support via the https://robot.your-server.de.
Technical support responded within two minutes, as they reported, the server did not respond to keystrokes, there was a black screen, after the physical shutdown and power-up, it successfully launched.
Here such there are cases of a reset, it is necessary to be ready to everything.
At the next reboots, hangup no longer occurred.