Sometimes you may want to run ''fsck'' on your system disk rather than the default set by the boot manager (maybe the system is running a bit funny)\\
To do this, simply type

<code>
touch /forcefsck
</code>
//use **sudo** if your system requires it//\\

Then reboot with ''sudo reboot'' or ''sudo shutdown -r now''\\

In Ubuntu, to determine the number of boots to go before fsck is forced, use

<code>
sudo apt-get install showfsck
</code>

and run ''showfsck''