$ whereis -b fsck
fsck: /sbin/fsck.cramfs /sbin/fsck.fat /sbin/fsck.ext2 /sbin/fsck.msdos /sbin/fsck.ext3 /sbin/fsck.minix /sbin/fsck.vfat /sbin/fsck.ext4 /sbin/fsck

$ fsck --help

Usage:
 fsck [options] -- [fs-options] [<filesystem> ...]

Check and repair a Linux filesystem.

Options:
 -A         check all filesystems
 -C [<fd>]  display progress bar; file descriptor is for GUIs
 -l         lock the device to guarantee exclusive access
 -M         do not check mounted filesystems
 -N         do not execute, just show what would be done
 -P         check filesystems in parallel, including root
 -R         skip root filesystem; useful only with '-A'
 -r [<fd>]  report statistics for each device checked;
            file descriptor is for GUIs
 -s         serialize the checking operations
 -T         do not show the title on startup
 -t <type>  specify filesystem types to be checked;
            <type> is allowed to be a comma-separated list
 -V         explain what is being done

 -?, --help     display this help
     --version  display version

See the specific fsck.* commands for available fs-options.
For more details see fsck(8).