How to fix a continuously rebooting Linux system?

To fix the issue of Linux system constantly rebooting, you can try the following methods:

1. Check for hardware malfunctions: First, make sure that the hardware is not the issue by checking if the power connections are stable, the memory cards are inserted properly, and if the hard drive is damaged.
2. Check system logs: Upon logging into the system, examine the log files under the /var/log directory, such as /var/log/messages, /var/log/syslog, etc., to look for any abnormal information that can help identify the reason for the reboot.
3. Update or rollback drivers: Sometimes system restarts are caused by incompatible or buggy drivers. You can try updating or rolling back related drivers such as graphics card drivers, network card drivers, etc.
4. Check system services: Some system services may cause the system to restart. You can use the systemctl command to view the currently running services, try stopping some suspicious services, and then observe if the system still restarts.
5. Check the hard drive file system integrity using the fsck command, identify and repair any errors that may be present. You can do this by pressing Ctrl + Alt + F2 to switch to the tty terminal during startup, and then using the fsck command to check and repair.
6. Check for system updates: If the system is already up to date and the issue occurred after the latest update, you can try rolling back to a previous kernel version or wait for a fixed update to be released.

If none of the above methods work to solve the issue, further debugging and troubleshooting may be needed. Consider consulting a professional Linux system administrator or seeking help from the Linux community.