Command = badblocks
Utility = Search for badblocks on specified device (Usually a partition)

Command line :

delorimier:/# badblocks /dev/hda4 -v

Sample output :

Checking for bad blocks in read-only mode
From block 0 to 1895670
1895668
1895669
Pass completed, 2 bad blocks found.

Usage :

Usage: badblocks [-b block_size] [-i input_file] [-o output_file] [-svwnf]
 [-c blocks_at_once] [-p num_passes] device [last_block [start_count]]