Whether some key commands that the node upgrade depends on are working
Executing the rpm or dpkg command failed. In this case, log in to the affected node and check whether the following commands are available:
rpm -qa
rpm --rebuilddb
dpkg -l
dpkg --configure -a
If the systemctl status command on a node is unavailable, many check items will be affected. Log in to the node and check the availability of the following commands:
systemctl status kubelet