Well, there is command-line utility called dd. To use it, you need to get really sure what are device names of your source and target. 'fdisk -l' lists all partitions with device names, so it can help you understand which disk is which device name. Then (of course, new disk must be equal or a bit bigger) you can run
dd if=source_disk of=target_disk bs=1048576
- 'if' means input file, 'of' is output file, and do not switch the order by accident! To see progress you can get one more console and run 'pkill -USR1 dd' . dd will print some statistics.