Force fsck on boot using /forcefsck

By creating /forcefsck file you will force the Linux system (or rc scripts) to perform a full file system check.

Login as the root:
$ su -
Change directory to root (/) directory:
# cd /
Create a file called forcefsck:
# touch /forcefsck
Now reboot the system:
# reboot

Force fsck on next boot using shutdown command

The -F option force fsck on reboot, login as root and type the following command to reboot and run fsck:
# shutdown -rF now