need a shell script to convert big endian to little endian

For 32 bit addresses, assuming it's zero padded:

v=00d66d7e 
echo ${v:6:2}${v:4:2}${v:2:2}${v:0:2}
# 7e6dd600

Just had to do this... but from decimal to little endian.. adapting that here:

echo 00d66d7e | tac -rs .. | echo "$(tr -d '\n')"

achieves the desired result, for arbitrarily sized hexadecimal representations of unsigned integers.

(h/t 'tac -rs' MestreLion, very nice!)

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