You can change this with a simple command but there is a better way of doing this: AutoFsck.
AutoFsck works like this: when you shut down your computer, it finds the info on your disks and determines if your disks need to be checked and if so, it asks you if you want to check them. If you select 'yes', your drives will be checked before the computer shuts down and if you select 'no', fsck will not run the next time your computer boots.
Please note that AutoFsck does not stop fsck from running if the filesystem in question is flagged as unclean during boot.
Download AutoFsck (Ubuntu .deb)