Ubuntu bsdmainutils package.
od alternative with better defaults, but not POSIX 7.
Uses saner hexadecimal defaults.
hd has even saner defaults.
View bytes in hexadecimal.
echo -n abc | hexdump -C
Options:
-C: see bytes in hexadecimal-n32: only 32 bytes-s32: start at byte 32-v: show duplicate lines-e '1/1 " %02X"': format string