What's the opposite of od(1)?

Question

Say I have 8b1f 0008 0231 49f6 0300 f1f3 75f4 0c72 f775 0850 7676 720c 560d 75f0 02e5 ce00 0861 1302 0000 0000, how can I easily get a binary file from that without copying+pasting into a hex editor?

Answer 1

See xxd.

Answer 2

Use:

% xxd -r -p in.txt out.bin