Checking your file system with fsck

In some case, the file system may experience problems, we can fix with the fsck. Make backup the files on partition with problem, you can create a image the disk our copy the files for other media.
This example we go utilize the partition /dev/sda5, now we go umount the partition with command umount.

sudo umount /dev/sda5

now type the command:

sudo fsck /dev/sda5

wait the fsck terminate the task.

Do not utilize the command for Windows file system, for this utilize the own Windows.
Never run the command with partition mounting, can corrupt the files.