Updating the Linux kernel on Hetzner servers

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

Updated kernel:

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:

reboot

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.

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