How to check the reason for a system reboot in Linux?

In a Linux system, you can view the reason for system reboot by following these steps:

1. Use the dmesg command to view system logs:
   The dmesg command can display kernel logs from system startup, including the reasons for system restarts. Use the following command to view them:
2. Search for the keyword “reset” in the system log using the command “dmesg”.
3. Check the system reboot history with the last command:
   The last command can display the login and reboot history of the system. Use the following command to view:
4. most recent system restart
5. View the log files in the /var/log directory:
   The Linux system records the reasons for system reboots in various log files located in the /var/log directory, commonly including /var/log/messages, /var/log/syslog, and others. Use the following command to view the reasons for reboots in the log files:
6. Search for the keyword “reboot” in the /var/log/messages file.

The methods above are common, but the specifics of how to check the reasons for a system reboot may vary depending on the Linux distribution and system configuration.