I have an issue sorting a file based on the first two columns.The layout of the file is:1 998688068 PizzaFan Insurance 22.475 072821325 Plaisio Computers 26.354 998688068 PizzaFan Food 27.325 456834578 G.Yannopoulos Medical 91.67........I used this command :sort -n -k 1,2 $fpath -o $fpath.orderedThe sort result is:1 473151252 Goodys Food 7.151 951515524 Atlantic SuperMarket 41.321 998688068 Atlantic SuperMarket 80.231 998688068 PizzaFan Food 61.721 998688068 PizzaFan Insurance 22.472 094321587 Vasilopoulos SuperMarket 6.50........I don't understand why all columns get sorted (see 3rd column & PizzaFan Insurance)I think -k 1,2 means sort on column 1 and resolve ties with column 2, but it's like it doesn't work.It's the same as using the:sort -n $fpath -o $fpath.ordered
GNU utility: sort 
sort