You didn't mention the OS and/or version of sort you're using. If it's GNU sort replace the -n with a -h. So "du -sh * | sort -hk1,1" – tinkDec 17 '12 at 19:04
@tink you comment solve the question – juanpabloDec 17 '12 at 19:16
Now I wish I had made it an answer ;D – tinkDec 17 '12 at 19:25
@tink with you comment make a answer for close this question :) – juanpabloDec 17 '12 at 19:29