How do I use fsck to repair disk problems?

Answered by Antonio Sutton

To use fsck to repair disk problems on a Linux root partition, you need to follow these steps:

1. Power on or reboot your machine: Start by either powering on your machine or initiating a reboot. This can be done through the graphical user interface (GUI) or by using the terminal. If you choose to use the terminal, you can issue the command `sudo reboot` to initiate the reboot process.

2. Access the advanced options: During the boot-up process, you need to press and hold the shift key. This will bring up the GRUB menu, which allows you to select different options for your operating system.

3. Choose recovery mode: From the GRUB menu, you should see the option “Advanced options for Ubuntu.” Select this option using the arrow keys and press Enter. This will take you to a new menu with different recovery options.

4. Select fsck: In the recovery mode menu, you will find a list of options to choose from. Look for the option that includes “(recovery mode)” in its description. Use the arrow keys to highlight this option and press Enter. This will start the recovery mode, which provides a set of tools for troubleshooting and repairing issues.

5. Run fsck: Once you are in recovery mode, you will see a menu with different options. Look for the option that says “fsck – Check all file systems.” Select this option using the arrow keys and press Enter. Fsck (File System Consistency Check) is a command-line tool used to check the integrity of file systems and repair any inconsistencies.

6. Follow the prompts: The fsck tool will now scan your root partition for any disk problems and prompt you for actions to take. It may display various information about the file system, such as the number of inodes, blocks, and free space. It will then ask you if you want to perform specific actions, such as fixing errors or recovering data.

7. Take appropriate actions: Depending on the issues found during the scan, you will need to choose the appropriate actions. Fsck will typically provide options such as fixing errors automatically, fixing errors manually, or skipping specific errors. You can use the arrow keys to navigate the menu and press Enter to select an option.

8. Repeat if necessary: After completing the fsck process, you may be prompted to run it again if there are still issues that need to be addressed. If prompted, select the option to run fsck again and follow the prompts as before.

9. Reboot your system: Once you have completed the necessary repairs using fsck, you can select the option to reboot your system from the recovery mode menu. This will exit the recovery mode and restart your machine.

It’s important to note that running fsck on the root partition should be done with caution, as it can potentially cause data loss or other issues if not performed correctly. It’s recommended to have a recent backup of your important data before proceeding with any disk repairs.