Cannot shut down and restart. the root account has expired. What should I do?

Cannot shut down and restart. the root account has expired. What should I do? -- Linux general technology-Linux technology and application information. For details, refer to the following section. [I = s] This post was also edited in a hurry from in winter.

Example: the root account has expired and cannot be shut down. How can I re-enable the root account? No matter what the method is, give me some ideas, or just don't have the ability. Currently, only common users created previously have the default permissions for creating users.

Supplement
Logon prompt: Your account has expired; please contact your system administrator