When the system starts throwing errors about the main filesystem, it’s time for a check.
fsck handles the file system check.
While a file system check shouldn’t loose any data, it’s possible to loose ALL your data. Especially if there’s an actually issue with the filesystem. Make sure you have a backup.
To force check the system in systemd, add the below to your kernel options. This is the
linux line in grub which can be edited by pressing
e (for ’edit’) on the selected system when the system shows the selection of operation systems in grub.
So it looks something like:
linux /vmlinuz-linux root=..... quiet fsck.mode=force initrd /initramfs-linux.img
This will run the
fsck automatically. If there is anything that the system needs you attention for, it will drop you to a shell where you can run it manually.
With the traditional SysVinit system, you would create a file in the root (
/) of the system named
It’s also possible to boot into Single User Mode by adding the below to the kernel line:
(On traditional systems, add
This will give you a prompt. Typically, we will want to run something like this, where
/dev/sdX is the path to our hard drive.
fsck -C0 /dev/sdX