How to troubleshoot when unable to boot into Linux system

If the Linux system cannot boot up properly, you can try the following solutions:

1. Check hardware connections: Make sure all hardware devices are properly connected and that there are no loose connections.
2. Check the boot sequence to ensure that the hard drive is the first boot device. Access the BIOS settings interface, review the boot options, and set the hard drive as the primary boot device.
3. Check the boot loader: It may be damaged or missing, such as GRUB, which is preventing you from accessing the system. Try booting the computer using the Linux installation media and choose the option to repair the system, reinstall, or repair the boot loader.
4. Check the file system: Boot the computer using a Linux installation media and select the option to check the file system, repairing any disk errors.
5. Restore Backup: If there is a recent system backup available, you can try restoring the backup file to restore the system.
6. Use recovery mode: Some Linux distributions offer a recovery mode option that allows you to attempt to enter recovery mode to fix the system.
7. Reinstalling system: If all the above methods fail to solve the problem, the last option is to reinstall the Linux system. Before reinstalling, make sure to back up important data.

Please note that the applicability of these methods may vary depending on the specific situation, and if the issue persists, further hardware inspection or professional technical support may be required.