dd

Convert and copy a file. Also, write to magnetic tape.

Use

dd if=<PATH> of=<PATH> duplicate infile to outfile

Ex:
dd if=/dev/urandom of=/dev/st0 bs=65536 count=1000 write a random data stream to tape st0 with 65K block size 1000 times

status=progress show progress and speed
bs=<BYTES> read and write up to BYTES bytes at a time (default: 512)
count=<N> copy only N input blocks

To mount a dd disk image with multiple partitions:
losetup -Pf /path/to/your/image.dd