Linux Tip: SORT of linux
If you want to sort a tab limited file in ascending order according to one column (like 5th column), you can use: sort -k5,5n input However, if you want to sort the file in descending order ccording to one column (like 5th column), you cann't use: sort -r -k5,5n input You can use: sort -r n-k5,5 input -n, --numeric-sort compare according to string numerical value -r, --reverse reverse the result of comparisons