sort utility in Ubuntu 10.04 (Lucid) always sort by case-insensitive, just like if you specify
--ignore-case to it.
The two sort just give the same result: echo -e "c\nb\nB\na" | sort echo -e "c\nb\nB\na" | sort --ignore-case
But sometimes I want to sort by case-sensitive, so the upper-case letters come first, then lower-case letter. Is it possible?