Sort CSV file based on first column

Using csvsort.

1. Install csvkit if not already installed.

   brew install csvkit
   

2. Sort CSV by first column.

   csvsort -c 1 original.csv > sorted.csv
   

sort -k1 -n -t, filename should do the trick.

-k1 sorts by column 1.

-n sorts numerically instead of lexicographically (so "11" will not come before "2,3...").

-t, sets the delimiter (what separates values in your file) to , since your file is comma-separated.

I don't know why above solution was not working in my case.

15,5
17,2
18,6
19,4
8,25
8,90
9,47
9,49
10,67
10,90
13,96
159,9

however this command solved my problem.

sort -t"," -k1n,1 fileName