Check hard drive for bad sectors in Linux

Check for bad sectors with status 
 sudo badblocks -v -s /dev/sdX 
 
 
 
 
 
 
 
 
 -v : Verbose output, lists bad sectors. 
 
 
 -s : Shows progress as a percentage of completion. 
 
 For a non-destructive test, use -n instead: sudo badblocks -n -v /dev/sdX . 
 To save bad sector list: sudo badblocks -v -o badsectors.txt /dev/sdX . 
 
 
 If you need larger block sizes use this: 
 sudo badblocks -v -s -b 4096 /dev/sdX 
 This will give you 3KB block sizes.