alex@desktop:~$ sudo ntfsfix /dev/sdb1
[sudo] password for alex:
Failed to determine whether /dev/sdb1 is mounted: No such file or directory
Mounting volume... Failed to access '/dev/sdb1': No such file or directory
Error opening '/dev/sdb1': No such file or directory
FAILED
Attempting to correct errors... Failed to access '/dev/sdb1': No such file or directory
Error opening '/dev/sdb1': No such file or directory
FAILED
Failed to startup volume: No such file or directory
Failed to access '/dev/sdb1': No such file or directory
Error opening '/dev/sdb1': No such file or directory
Volume is corrupt. You should run chkdsk.
alex@desktop:~$ chkdsk /dev/sdb1
chkdsk: command not found
alex@desktop:~$ sudo chkdsk /dev/sdb1
sudo: chkdsk: command not found