Convert decimal to hexadecimal in UNIX shell script

Question

In a UNIX shell script, what can I use to convert decimal numbers into hexadecimal? I thought od would do the trick, but it\'s not realizing I\'m feeding it ASCII represent

Answer 1

echo "obase=16; 34" | bc

If you want to filter a whole file of integers, one per line:

( echo "obase=16" ; cat file_of_integers ) | bc