fsck is a file system error check command. Try the root password of nothing, (just the enter key), when ask for the password. Then use the fsck command to repair the file system before rebooting.
fsck - check and repair a Linux file system Try fsck with no options.
SYNOPSIS
fsck [
-sACVRTNP ] [
-t fstype ]
[filesys ... ] [--] [
fs-specific-options ]
DESCRIPTION
fsck is used to check and optionally repair one or more Linux file systems.
filesys can be a device name (e.g.
/dev/hdc1,
/dev/sdb2), a mount point (e.g.
/,
/usr,
/home), or an ext2 label or UUID specifier (e.g. UUID=8868abf6-88c5-4a83-98b8-bfc24057f7bd or LABEL=root). Normally, the
fsck program will try to run filesystems on different physical disk drives in parallel to reduce total amount time to check all of the filesystems.
If no filesystems are specified on the command line, and the
-A option is not specified,
fsck will default to checking filesystems in
/etc/fstab serial. This is equivalent to the
-As options.
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