http://www.unix.com – Hi, I am trying to sort the following file in descending order of its fourth column. Code: 2 1 363828 -2.423225e-03 3 1 363828 4.132763e-03 3 2 363828 8.150133e-03 4 1 363828 4.126890e-03 I use Code: sort -k4,4g -r input.txt > output.txt But the file is still in ascending order. How do I fix this? Thanks! (HowTos)