xxxxxxxxxx
# decimal to binary
echo "obase=2;YOUR_DECIMAL_VALUE" | bc
# base 10 to binary
echo "obase=2;ibase=10;YOUR_BASE10_VALUE" | bc
# hex to decimal
printf "%d" 0xYOUR_HEX_VALUE
# hex( 0xNNN )->decimal
# octal( 0NNN )->decimal
# decimal-> hex( %#x )
# decimal-> octal( %#o )
printf "%d %d %#x %#o\n" 0x10 010 16 8