ubuntu@ubuntu:~$ sudo fsck /dev/sda1 
fsck from util-linux 2.26.2
e2fsck 1.42.12 (29-Aug-2014)
/dev/sda1 contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Inodes that were part of a corrupted orphan linked list found.  Fix<y>? yes
Inode 2497006 was part of the orphaned inode list.  FIXED.
Inode 2497369 was part of the orphaned inode list.  FIXED.
Inode 2497391 was part of the orphaned inode list.  FIXED.
Inode 2497437 was part of the orphaned inode list.  FIXED.
Inode 2497438 was part of the orphaned inode list.  FIXED.
Deleted inode 2497443 has zero dtime.  Fix<y>?