What you need to do is tell "sort" that you want to sort numerically instead of alphabetically: "1,2,13,20" is sorted numerically, alphabetically sorted it would look like "1,13,2,20", because "1" comes before "2" in the "alphabet" (the ASCII code) the sort command uses. Aphabetical sorting is the default, numerical sorting can bei achieved by using the option "-n" as you have already found out. If you want to reverse the sorting you have to use "-r" as you have already noticed too. So combine these two to get:

Code:

"cat file | sort -rn"

to get the desired result.

bakunin